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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 | Oracle表分区 Oracle .废话少说，直接讲分区语法。Oracle表分区分为四种：范围分区，散列分区，列表分区和复合分区。 一：范围分区 就是根据数据库表中某一字段的值的范围来划分分区，例如：Sql代码 1.create table graderecord 2. ( 3. sno varchar2(10), 4. sname varchar2(20), 5. dormitory varchar2(3), 6. grade int 7.) 8.partition by range(grade) 9.( 10. partition bujige values less than(60), --不及格 11. partition jige values less than(85), --及格 12. partition youxiu values less than(maxvalue) --优秀 13.) create table graderecord ( sno varchar2(10), sname varchar2(20), dormitory varchar2(3), grade int)partition by range(grade)( partition bujige values less than(60), --不及格 partition jige values less than(85), --及格 partition youxiu values less than(maxvalue) --优秀) 插入实验数据：Sql代码 1.insert into graderecord values('511601','魁','229',92); 2.insert into graderecord values('511602','凯','229',62); 3.insert into graderecord values('511603','东','229',26); 4.insert into graderecord values('511604','亮','228',77); 5.insert into graderecord values('511605','敬','228',47); 6.insert into graderecord(sno,sname,dormitory) values('511606','峰','228'); 7.insert into graderecord values('511607','明','240',90); 8.insert into graderecord values('511608','楠','240',100); 9.insert into graderecord values('511609','涛','240',67); 10.insert into graderecord values('511610','博','240',75); 11.insert into graderecord values('511611','铮','240',60); insert into graderecord values('511601','魁','229',92);insert into graderecord values('511602','凯','229',62);insert into graderecord values('511603','东','229',26);insert into graderecord values('511604','亮','228',77);insert into graderecord values('511605','敬','228',47);insert into graderecord(sno,sname,dormitory) values('511606','峰','228');insert into graderecord values('511607','明','240',90);insert into graderecord values('511608','楠','240',100);insert into graderecord values('511609','涛','240',67);insert into graderecord values('511610','博','240',75);insert into graderecord values('511611','铮','240',60); 下面查询一下全部数据，然后查询各个分区数据，代码一起写：Java代码 1.select * from graderecord; 2.select * from graderecord partition(bujige); 3.select * from graderecord partition(jige); 4.select * from graderecord partition(youxiu); select * from graderecord;select * from graderecord partition(bujige);select * from graderecord partition(jige);select * from graderecord partition(youxiu); 全部数据如下： 不及格数据如下： 及格数据如下： 优秀数据如下： 说明：数据中有空值，Oracle机制会自动将其规划到maxvalue的分区中。 二：散列分区 散列分区是根据字段的hash值进行均匀分布，尽可能的实现各分区所散列的数据相等。还是刚才那个表，只不过把范围分区改换为散列分区，语法如下（删除表之后重建）：Sql代码 1.create table graderecord 2.( 3. sno varchar2(10), 4. sname varchar2(20), 5. dormitory varchar2(3), 6. grade int 7.) 8.partition by hash(sno) 9.( 10. partition p1, 11. partition p2, 12. partition p3 13.); create table graderecord( sno varchar2(10), sname varchar2(20), dormitory varchar2(3), grade int)partition by hash(sno)( partition p1, partition p2, partition p3);插入实验数据，与范围分区实验插入的数据相同。然后查询分区数据：Sql代码 1.select * from graderecord partition(p1); 2.select * from graderecord partition(p2); 3.select * from graderecord partition(p3); select * from graderecord partition(p1);select * from graderecord partition(p2);select * from graderecord partition(p3); p1分区的数据： p2分区的数据： p3分区的数据： 说明：散列分区即为哈希分区，Oracle采用哈希码技术分区，具体分区如何由Oracle说的算，也可能我下一次搜索就不是这个数据了。 三：列表分区 列表分区明确指定了根据某字段的某个具体值进行分区，而不是像范围分区那样根据字段的值范围来划分的。Sql代码 1.create table graderecord 2.( 3. sno varchar2(10), 4. sname varchar2(20), 5. dormitory varchar2(3), 6. grade int 7.) 8.partition by list(dormitory) 9.( 10. partition d229 values('229'), 11. partition d228 values('228'), 12. partition d240 values('240') 13.) create table graderecord( sno varchar2(10), sname varchar2(20), dormitory varchar2(3), grade int)partition by list(dormitory)( partition d229 values('229'), partition d228 values('228'), partition d240 values('240')) 以上根据宿舍来进行列表分区，插入与范围分区实验相同的数据，做查询如下：Sql代码 1.select * from graderecord partition(d229); 2.select * from graderecord partition(d228); 3.select * from graderecord partition(d240); select * from graderecord partition(d229);select * from graderecord partition(d228);select * from graderecord partition(d240); d229分区所得数据如下： d228分区所得数据如下： d240分区所得数据如下： 四：复合分区 （范围-散列分区，范围-列表分区）首先讲范围-散列分区。先声明一下：列表分区不支持多列，但是范围分区和哈希分区支持多列。代码如下：Sql代码 1.create table graderecord 2.( 3. sno varchar2(10), 4. sname varchar2(20), 5. dormitory varchar2(3), 6. grade int 7.) 8.partition by range(grade) 9.subpartition by hash(sno,sname) 10.( 11. partition p1 values less than(75) 12. ( 13. subpartition sp1,subpartition sp2 14. ), 15. partition p2 values less than(maxvalue) 16. ( 17. subpartition sp3,subpartition sp4 18. ) 19.); create table graderecord( sno varchar2(10), sname varchar2(20), dormitory varchar2(3), grade int)partition by range(grade)subpartition by hash(sno,sname)( partition p1 values less than(75) ( subpartition sp1,subpartition sp2 ), partition p2 values less than(maxvalue) ( subpartition sp3,subpartition sp4 )); 以grade划分范围，然后以sno和sname划分散列分区，当数据量大的时候散列分区则趋于“平均”。插入数据：Sql代码 1.insert into graderecord values('511601','魁','229',92); 2.insert into graderecord values('511602','凯','229',62); 3.insert into graderecord values('511603','东','229',26); 4.insert into graderecord values('511604','亮','228',77); 5.insert into graderecord values('511605','敬','228',47); 6.insert into graderecord(sno,sname,dormitory) values('511606','峰','228'); 7.insert into graderecord values('511607','明','240',90); 8.insert into graderecord values('511608','楠','240',100); 9.insert into graderecord values('511609','涛','240',67); 10.insert into graderecord values('511610','博','240',75); 11.insert into graderecord values('511611','铮','240',60); 12.insert into graderecord values('511612','狸','244',72); 13.insert into graderecord values('511613','杰','244',88); 14.insert into graderecord values('511614','萎','244',19); 15.insert into graderecord values('511615','猥','244',65); 16.insert into graderecord values('511616','丹','244',59); 17.insert into graderecord values('511617','靳','244',95); insert into graderecord values('511601','魁','229',92);insert into graderecord values('511602','凯','229',62);insert into graderecord values('511603','东','229',26);insert into graderecord values('511604','亮','228',77);insert into graderecord values('511605','敬','228',47);insert into graderecord(sno,sname,dormitory) values('511606','峰','228');insert into graderecord values('511607','明','240',90);insert into graderecord values('511608','楠','240',100);insert into graderecord values('511609','涛','240',67);insert into graderecord values('511610','博','240',75);insert into graderecord values('511611','铮','240',60);insert into graderecord values('511612','狸','244',72);insert into graderecord values('511613','杰','244',88);insert into graderecord values('511614','萎','244',19);insert into graderecord values('511615','猥','244',65);insert into graderecord values('511616','丹','244',59);insert into graderecord values('511617','靳','244',95); 查询如下：Sql代码 1.select * from graderecord partition(p1); 2.select * from graderecord partition(p2); 3.select * from graderecord subpartition(sp1); 4.select * from graderecord subpartition(sp2); 5.select * from graderecord subpartition(sp3); 6.select * from graderecord subpartition(sp4); select * from graderecord partition(p1);select * from graderecord partition(p2);select * from graderecord subpartition(sp1);select * from graderecord subpartition(sp2);select * from graderecord subpartition(sp3);select * from graderecord subpartition(sp4); 分区p1数据如下，本例中75分以下： 分区p2数据如下，本例中75分之上包括75分： 子分区sp1： 子分区sp2： 子分区sp3： 子分区sp4： 说明：当数据量越来越大时，哈希分区的分区表中数据越来越趋于平衡。 下面讲范围-列表分区范围-列表分区有两种创立方式，先说说没有模板的创建方式，这个表我要重建：Sql代码 1.create table MobileMessage 2.( 3. ACCT_MONTH VARCHAR2(6), -- 帐期 格式：年月 YYYYMM 4. AREA_NO VARCHAR2(10), -- 地域号码 5. DAY_ID VARCHAR2(2), -- 本月中的第几天 格式 DD 6. SUBSCRBID VARCHAR2(20), -- 用户标识 7. SVCNUM VARCHAR2(30) -- 手机号码 8.) 9.partition by range(ACCT_MONTH,AREA_NO) subpartition by list(DAY_ID) 10.( 11. partition p1 values less than('200705','012') 12. ( 13. subpartition shangxun1 values('01','02','03','04','05','06','07','08','09','10'), 14. subpartition zhongxun1 values('11','12','13','14','15','16','17','18','19','20'), 15. subpartition xiaxun1 values('21','22','23','24','25','26','27','28','29','30','31') 16. ), 17. partition p2 values less than('200709','014') 18. ( 19. subpartition shangxun2 values('01','02','03','04','05','06','07','08','09','10'), 20. subpartition zhongxun2 values('11','12','13','14','15','16','17','18','19','20'), 21. subpartition xiaxun2 values('21','22','23','24','25','26','27','28','29','30','31') 22. ), 23. partition p3 values less than('200801','016') 24. ( 25. subpartition shangxun3 values('01','02','03','04','05','06','07','08','09','10'), 26. subpartition zhongxun3 values('11','12','13','14','15','16','17','18','19','20'), 27. subpartition xiaxun3 values('21','22','23','24','25','26','27','28','29','30','31') 28. ) 29.) create table MobileMessage( ACCT_MONTH VARCHAR2(6), -- 帐期 格式：年月 YYYYMM AREA_NO VARCHAR2(10), -- 地域号码 DAY_ID VARCHAR2(2), -- 本月中的第几天 格式 DD SUBSCRBID VARCHAR2(20), -- 用户标识 SVCNUM VARCHAR2(30) -- 手机号码)partition by range(ACCT_MONTH,AREA_NO) subpartition by list(DAY_ID)( partition p1 values less than('200705','012') ( subpartition shangxun1 values('01','02','03','04','05','06','07','08','09','10'), subpartition zhongxun1 values('11','12','13','14','15','16','17','18','19','20'), subpartition xiaxun1 values('21','22','23','24','25','26','27','28','29','30','31') ), partition p2 values less than('200709','014') ( subpartition shangxun2 values('01','02','03','04','05','06','07','08','09','10'), subpartition zhongxun2 values('11','12','13','14','15','16','17','18','19','20'), subpartition xiaxun2 values('21','22','23','24','25','26','27','28','29','30','31') ), partition p3 values less than('200801','016') ( subpartition shangxun3 values('01','02','03','04','05','06','07','08','09','10'), subpartition zhongxun3 values('11','12','13','14','15','16','17','18','19','20'), subpartition xiaxun3 values('21','22','23','24','25','26','27','28','29','30','31') )) 插入实验数据：Sql代码 1.insert into MobileMessage values('200701','010','04','ghk001','13800000000'); 2.insert into MobileMessage values('200702','015','12','myx001','13633330000'); 3.insert into MobileMessage values('200703','015','24','hjd001','13300000000'); 4.insert into MobileMessage values('200704','010','04','ghk001','13800000000'); 5.insert into MobileMessage values('200705','010','04','ghk001','13800000000'); 6.insert into MobileMessage values('200705','011','18','sxl001','13222000000'); 7.insert into MobileMessage values('200706','011','21','sxl001','13222000000'); 8.insert into MobileMessage values('200706','012','11','tgg001','13800044400'); 9.insert into MobileMessage values('200707','010','04','ghk001','13800000000'); 10.insert into MobileMessage values('200708','012','24','tgg001','13800044400'); 11.insert into MobileMessage values('200709','014','29','zjj001','13100000000'); 12.insert into MobileMessage values('200710','014','29','zjj001','13100000000'); 13.insert into MobileMessage values('200711','014','29','zjj001','13100000000'); 14.insert into MobileMessage values('200711','013','30','wgc001','13444000000'); 15.insert into MobileMessage values('200712','013','30','wgc001','13444000000'); 16.insert into MobileMessage values('200712','010','30','ghk001','13800000000'); 17.insert into MobileMessage values('200801','015','22','myx001','13633330000'); insert into MobileMessage values('200701','010','04','ghk001','13800000000');insert into MobileMessage values('200702','015','12','myx001','13633330000');insert into MobileMessage values('200703','015','24','hjd001','13300000000');insert into MobileMessage values('200704','010','04','ghk001','13800000000');insert into MobileMessage values('200705','010','04','ghk001','13800000000');insert into MobileMessage values('200705','011','18','sxl001','13222000000');insert into MobileMessage values('200706','011','21','sxl001','13222000000');insert into MobileMessage values('200706','012','11','tgg001','13800044400');insert into MobileMessage values('200707','010','04','ghk001','13800000000');insert into MobileMessage values('200708','012','24','tgg001','13800044400');insert into MobileMessage values('200709','014','29','zjj001','13100000000');insert into MobileMessage values('200710','014','29','zjj001','13100000000');insert into MobileMessage values('200711','014','29','zjj001','13100000000');insert into MobileMessage values('200711','013','30','wgc001','13444000000');insert into MobileMessage values('200712','013','30','wgc001','13444000000');insert into MobileMessage values('200712','010','30','ghk001','13800000000');insert into MobileMessage values('200801','015','22','myx001','13633330000'); 查询结果如下：Sql代码 1.select * from MobileMessage; select * from MobileMessage; 分区p1查询结果如下： 分区p2查询结果如下： 子分区xiaxun2查询结果如下： 说明：范围分区 range(A,B)的分区法则，范围分区都是 values less than(A,B)的，通常情况下以A为准，如果小于A的不用考虑B，直接插进去，如果等于A那么考虑B，要是满足B的话也插进去。 另一种范围-列表分区，包含模板的（比较繁琐，但是更加精确，处理海量存储数据十分必要）：Sql代码 1.create table MobileMessage 2.( 3. ACCT_MONTH VARCHAR2(6), -- 帐期 格式：年月 YYYYMM 4. AREA_NO VARCHAR2(10), -- 地域号码 5. DAY_ID VARCHAR2(2), -- 本月中的第几天 格式 DD 6. SUBSCRBID VARCHAR2(20), -- 用户标识 7. SVCNUM VARCHAR2(30) -- 手机号码 8.) 9.partition by range(ACCT_MONTH,AREA_NO) subpartition by list(DAY_ID) 10.subpartition template 11.( 12. subpartition sub1 values('01'),subpartition sub2 values('02'), 13. subpartition sub3 values('03'),subpartition sub4 values('04'), 14. subpartition sub5 values('05'),subpartition sub6 values('06'), 15. subpartition sub7 values('07'),subpartition sub8 values('08'), 16. subpartition sub9 values('09'),subpartition sub10 values('10'), 17. subpartition sub11 values('11'),subpartition sub12 values('12'), 18. subpartition sub13 values('13'),subpartition sub14 values('14'), 19. subpartition sub15 values('15'),subpartition sub16 values('16'), 20. subpartition sub17 values('17'),subpartition sub18 values('18'), 21. subpartition sub19 values('19'),subpartition sub20 values('20'), 22. subpartition sub21 values('21'),subpartition sub22 values('22'), 23. subpartition sub23 values('23'),subpartition sub24 values('24'), 24. subpartition sub25 values('25'),subpartition sub26 values('26'), 25. subpartition sub27 values('27'),subpartition sub28 values('28'), 26. subpartition sub29 values('29'),subpartition sub30 values('30'), 27. subpartition sub31 values('31') 28.) 29.( 30. partition p_0701_010 values less than('200701','011'), 31. partition p_0701_011 values less than('200701','012'), 32. partition p_0701_012 values less than('200701','013'), 33. partition p_0701_013 values less than('200701','014'), 34. partition p_0701_014 values less than('200701','015'), 35. partition p_0701_015 values less than('200701','016'), 36. partition p_0702_010 values less than('200702','011'), 37. partition p_0702_011 values less than('200702','012'), 38. partition p_0702_012 values less than('200702','013'), 39. partition p_0702_013 values less than('200702','014'), 40. partition p_0702_014 values less than('200702','015'), 41. partition p_0702_015 values less than('200702','016'), 42. partition p_0703_010 values less than('200703','011'), 43. partition p_0703_011 values less than('200703','012'), 44. partition p_0703_012 values less than('200703','013'), 45. partition p_0703_013 values less than('200703','014'), 46. partition p_0703_014 values less than('200703','015'), 47. partition p_0703_015 values less than('200703','016'), 48. partition p_0704_010 values less than('200704','011'), 49. partition p_0704_011 values less than('200704','012'), 50. partition p_0704_012 values less than('200704','013'), 51. partition p_0704_013 values less than('200704','014'), 52. partition p_0704_014 values less than('200704','015'), 53. partition p_0704_015 values less than('200704','016'), 54. partition p_0705_010 values less than('200705','011'), 55. partition p_0705_011 values less than('200705','012'), 56. partition p_0705_012 values less than('200705','013'), 57. partition p_0705_013 values less than('200705','014'), 58. partition p_0705_014 values less than('200705','015'), 59. partition p_0705_015 values less than('200705','016'), 60. partition p_0706_010 values less than('200706','011'), 61. partition p_0706_011 values less than('200706','012'), 62. partition p_0706_012 values less than('200706','013'), 63. partition p_0706_013 values less than('200706','014'), 64. partition p_0706_014 values less than('200706','015'), 65. partition p_0706_015 values less than('200706','016'), 66. partition p_0707_010 values less than('200707','011'), 67. partition p_0707_011 values less than('200707','012'), 68. partition p_0707_012 values less than('200707','013'), 69. partition p_0707_013 values less than('200707','014'), 70. partition p_0707_014 values less than('200707','015'), 71. partition p_0707_015 values less than('200707','016'), 72. partition p_0708_010 values less than('200708','011'), 73. partition p_0708_011 values less than('200708','012'), 74. partition p_0708_012 values less than('200708','013'), 75. partition p_0708_013 values less than('200708','014'), 76. partition p_0708_014 values less than('200708','015'), 77. partition p_0708_015 values less than('200708','016'), 78. partition p_0709_010 values less than('200709','011'), 79. partition p_0709_011 values less than('200709','012'), 80. partition p_0709_012 values less than('200709','013'), 81. partition p_0709_013 values less than('200709','014'), 82. partition p_0709_014 values less than('200709','015'), 83. partition p_0709_015 values less than('200709','016'), 84. partition p_0710_010 values less than('200710','011'), 85. partition p_0710_011 values less than('200710','012'), 86. partition p_0710_012 values less than('200710','013'), 87. partition p_0710_013 values less than('200710','014'), 88. partition p_0710_014 values less than('200710','015'), 89. partition p_0710_015 values less than('200710','016'), 90. partition p_0711_010 values less than('200711','011'), 91. partition p_0711_011 values less than('200711','012'), 92. partition p_0711_012 values less than('200711','013'), 93. partition p_0711_013 values less than('200711','014'), 94. partition p_0711_014 values less than('200711','015'), 95. partition p_0711_015 values less than('200711','016'), 96. partition p_0712_010 values less than('200712','011'), 97. partition p_0712_011 values less than('200712','012'), 98. partition p_0712_012 values less than('200712','013'), 99. partition p_0712_013 values less than('200712','014'), 100. partition p_0712_014 values less than('200712','015'), 101. partition p_0712_015 values less than('200712','016'), 102. partition p_0801_010 values less than('200801','011'), 103. partition p_0801_011 values less than('200801','012'), 104. partition p_0801_012 values less than('200801','013'), 105. partition p_0801_013 values less than('200801','014'), 106. partition p_0801_014 values less than('200801','015'), 107. partition p_0801_015 values less than('200801','016'), 108. partition p_other values less than(maxvalue, maxvalue) 109.); create table MobileMessage( ACCT_MONTH VARCHAR2(6), -- 帐期 格式：年月 YYYYMM AREA_NO VARCHAR2(10), -- 地域号码 DAY_ID VARCHAR2(2), -- 本月中的第几天 格式 DD SUBSCRBID VARCHAR2(20), -- 用户标识 SVCNUM VARCHAR2(30) -- 手机号码)partition by range(ACCT_MONTH,AREA_NO) subpartition by list(DAY_ID)subpartition template( subpartition sub1 values('01'),subpartition sub2 values('02'), subpartition sub3 values('03'),subpartition sub4 values('04'), subpartition sub5 values('05'),subpartition sub6 values('06'), subpartition sub7 values('07'),subpartition sub8 values('08'), subpartition sub9 values('09'),subpartition sub10 values('10'), subpartition sub11 values('11'),subpartition sub12 values('12'), subpartition sub13 values('13'),subpartition sub14 values('14'), subpartition sub15 values('15'),subpartition sub16 values('16'), subpartition sub17 values('17'),subpartition sub18 values('18'), subpartition sub19 values('19'),subpartition sub20 values('20'), subpartition sub21 values('21'),subpartition sub22 values('22'), subpartition sub23 values('23'),subpartition sub24 values('24'), subpartition sub25 values('25'),subpartition sub26 values('26'), subpartition sub27 values('27'),subpartition sub28 values('28'), subpartition sub29 values('29'),subpartition sub30 values('30'), subpartition sub31 values('31'))( partition p_0701_010 values less than('200701','011'), partition p_0701_011 values less than('200701','012'), partition p_0701_012 values less than('200701','013'), partition p_0701_013 values less than('200701','014'), partition p_0701_014 values less than('200701','015'), partition p_0701_015 values less than('200701','016'), partition p_0702_010 values less than('200702','011'), partition p_0702_011 values less than('200702','012'), partition p_0702_012 values less than('200702','013'), partition p_0702_013 values less than('200702','014'), partition p_0702_014 values less than('200702','015'), partition p_0702_015 values less than('200702','016'), partition p_0703_010 values less than('200703','011'), partition p_0703_011 values less than('200703','012'), partition p_0703_012 values less than('200703','013'), partition p_0703_013 values less than('200703','014'), partition p_0703_014 values less than('200703','015'), partition p_0703_015 values less than('200703','016'), partition p_0704_010 values less than('200704','011'), partition p_0704_011 values less than('200704','012'), partition p_0704_012 values less than('200704','013'), partition p_0704_013 values less than('200704','014'), partition p_0704_014 values less than('200704','015'), partition p_0704_015 values less than('200704','016'), partition p_0705_010 values less than('200705','011'), partition p_0705_011 values less than('200705','012'), partition p_0705_012 values less than('200705','013'), partition p_0705_013 values less than('200705','014'), partition p_0705_014 values less than('200705','015'), partition p_0705_015 values less than('200705','016'), partition p_0706_010 values less than('200706','011'), partition p_0706_011 values less than('200706','012'), partition p_0706_012 values less than('200706','013'), partition p_0706_013 values less than('200706','014'), partition p_0706_014 values less than('200706','015'), partition p_0706_015 values less than('200706','016'), partition p_0707_010 values less than('200707','011'), partition p_0707_011 values less than('200707','012'), partition p_0707_012 values less than('200707','013'), partition p_0707_013 values less than('200707','014'), partition p_0707_014 values less than('200707','015'), partition p_0707_015 values less than('200707','016'), partition p_0708_010 values less than('200708','011'), partition p_0708_011 values less than('200708','012'), partition p_0708_012 values less than('200708','013'), partition p_0708_013 values less than('200708','014'), partition p_0708_014 values less than('200708','015'), partition p_0708_015 values less than('200708','016'), partition p_0709_010 values less than('200709','011'), partition p_0709_011 values less than('200709','012'), partition p_0709_012 values less than('200709','013'), partition p_0709_013 values less than('200709','014'), partition p_0709_014 values less than('200709','015'), partition p_0709_015 values less than('200709','016'), partition p_0710_010 values less than('200710','011'), partition p_0710_011 values less than('200710','012'), partition p_0710_012 values less than('200710','013'), partition p_0710_013 values less than('200710','014'), partition p_0710_014 values less than('200710','015'), partition p_0710_015 values less than('200710','016'), partition p_0711_010 values less than('200711','011'), partition p_0711_011 values less than('200711','012'), partition p_0711_012 values less than('200711','013'), partition p_0711_013 values less than('200711','014'), partition p_0711_014 values less than('200711','015'), partition p_0711_015 values less than('200711','016'), partition p_0712_010 values less than('200712','011'), partition p_0712_011 values less than('200712','012'), partition p_0712_012 values less than('200712','013'), partition p_0712_013 values less than('200712','014'), partition p_0712_014 values less than('200712','015'), partition p_0712_015 values less than('200712','016'), partition p_0801_010 values less than('200801','011'), partition p_0801_011 values less than('200801','012'), partition p_0801_012 values less than('200801','013'), partition p_0801_013 values less than('200801','014'), partition p_0801_014 values less than('200801','015'), partition p_0801_015 values less than('200801','016'), partition p_other values less than(maxvalue, maxvalue)); 这个是带有模板子分区的，模板子分区详细到月中的天。这种分区模式只要建立了分区就会自动创建子分区的。 插入上面不带模板分区实验相同的数据，随机查询分区数据： 查询分区p_0701_010的数据：Sql代码 1.select * from MobileMessage partition(p_0701_010); select * from MobileMessage partition(p_0701_010); 查询结果： 查询子分区p_0701_010_sub4的数据：Sql代码 1.select * from MobileMessage subpartition(p_0701_010_sub4); select * from MobileMessage subpartition(p_0701_010_sub4); 查询结果如下： 查询分区p_0706_011的数据：Sql代码 1.select * from MobileMessage partition(p_0706_011); select * from MobileMessage partition(p_0706_011); 查询结果如下： 查询子分区p_0706_011_sub21的数据：Sql代码 1.select * from MobileMessage subpartition(p_0706_011_sub21); select * from MobileMessage subpartition(p_0706_011_sub21); 查询结果如下： 下面讲讲分区的维护操作：(1)分裂分区，以第一个范围分区为例：Sql代码 1.alter table graderecord split partition jige at(75) 2. into(partition keyi,partition lianghao); alter table graderecord split partition jige at(75) into(partition keyi,partition lianghao); 把分区及格分裂为两个分区：可以和良好。 (2)合并分区，以第一个范围分区为例：Sql代码 1.alter table graderecord merge partitions keyi,lianghao 2.into partition jige; alter table graderecord merge partitions keyi,lianghao into partition jige; 把可以和良好两个分区合并为及格。 (3)添加分区，由于在范围分区上添加分区要求添加的分区范围大于原有分区最大值，但原有分区最大值已经为maxvalue，故本处以第二个散列分区为例：Sql代码 1.alter table graderecord add partition p4; alter table graderecord add partition p4; 给散列分区例子又增加了一个分区p4 。 (4)删除分区，语法：Sql代码 1.alter table table_name drop partition partition_name; alter table table_name drop partition partition_name; (5)截断分区，清空分区中的数据Sql代码 1.alter table table_name truncate partition partition_name; alter table table_name truncate partition partition_name; 说明：对待分区的操作同样可以对待子分区，效果一样。删除一个分区会同时删除其下的子分区。合并多个分区也会把他们的子分区自动合并。分裂分区时注意分裂点。 另外不带模板子分区和带有模板子分区的分区表操作的区别：带有子分区模板的分区表在添加分区时候自动添加子分区，不带模板子分区的分区表没有这个功能；带有子分区模板的分区表在更改分区时只需更改分区，不带模板子分区的分区表在更改分区时一定注意连同子分区一起更改。 |