{"id":159993,"date":"2024-11-03T19:23:21","date_gmt":"2024-11-03T11:23:21","guid":{"rendered":"https:\/\/server.hk\/cnblog\/159993\/"},"modified":"2024-11-03T19:23:22","modified_gmt":"2024-11-03T11:23:22","slug":"mssql-%e6%95%99%e7%a8%8b-sql-select-top-limit-rownum-%e5%ad%90%e5%8f%a5","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/159993\/","title":{"rendered":"MSSQL \u6559\u7a0b SQL SELECT TOP, LIMIT, ROWNUM \u5b50\u53e5"},"content":{"rendered":"

MSSQL \u6559\u7a0b\uff1aSQL SELECT TOP, LIMIT, ROWNUM \u5b50\u53e5<\/h1>\n

\u5728\u8cc7\u6599\u5eab\u7ba1\u7406\u7cfb\u7d71\u4e2d\uff0cSQL\uff08\u7d50\u69cb\u5316\u67e5\u8a62\u8a9e\u8a00\uff09\u662f\u4e00\u7a2e\u7528\u65bc\u67e5\u8a62\u548c\u64cd\u4f5c\u8cc7\u6599\u7684\u6a19\u6e96\u8a9e\u8a00\u3002\u5c0d\u65bc\u4f7f\u7528 Microsoft SQL Server \u7684\u958b\u767c\u8005\u4f86\u8aaa\uff0c\u4e86\u89e3\u5982\u4f55\u6709\u6548\u5730\u4f7f\u7528 SELECT \u8a9e\u53e5\u4f86\u6aa2\u7d22\u8cc7\u6599\u662f\u81f3\u95dc\u91cd\u8981\u7684\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e SQL \u4e2d\u7684 TOP\u3001LIMIT \u548c ROWNUM \u5b50\u53e5\uff0c\u4e26\u63d0\u4f9b\u76f8\u95dc\u7684\u7bc4\u4f8b\u548c\u61c9\u7528\u5834\u666f\u3002<\/p>\n

1. SQL SELECT \u8a9e\u53e5\u6982\u8ff0<\/h2>\n

SQL SELECT \u8a9e\u53e5\u662f\u7528\u4f86\u5f9e\u8cc7\u6599\u8868\u4e2d\u6aa2\u7d22\u8cc7\u6599\u7684\u57fa\u672c\u8a9e\u53e5\u3002\u5176\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n

SELECT column1, column2, ...\nFROM table_name\nWHERE condition;<\/code><\/pre>\n
\u5728\u9019\u88e1\uff0ccolumn1\u3001column2 \u662f\u8981\u6aa2\u7d22\u7684\u6b04\u4f4d\uff0ctable_name \u662f\u8cc7\u6599\u8868\u7684\u540d\u7a31\uff0ccondition \u662f\u904e\u6ffe\u689d\u4ef6\u3002<\/p>\n
2. \u4f7f\u7528 TOP \u5b50\u53e5<\/h2>\n
\u5728 Microsoft SQL Server \u4e2d\uff0cTOP \u5b50\u53e5\u7528\u65bc\u9650\u5236\u67e5\u8a62\u7d50\u679c\u7684\u884c\u6578\u3002\u9019\u5c0d\u65bc\u9700\u8981\u5feb\u901f\u6aa2\u7d22\u524d\u5e7e\u689d\u8a18\u9304\u7684\u60c5\u6cc1\u975e\u5e38\u6709\u7528\u3002\u5176\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n
SELECT TOP (number) column1, column2, ...\nFROM table_name\nWHERE condition;<\/code><\/pre>\n
\u4f8b\u5982\uff0c\u5982\u679c\u6211\u5011\u60f3\u8981\u5f9e\u4e00\u500b\u540d\u70ba Employees \u7684\u8cc7\u6599\u8868\u4e2d\u6aa2\u7d22\u524d 5 \u540d\u54e1\u5de5\u7684\u59d3\u540d\u548c\u5de5\u8cc7\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u67e5\u8a62\uff1a<\/p>\n
SELECT TOP (5) Name, Salary\nFROM Employees\nORDER BY Salary DESC;<\/code><\/pre>\n
\u9019\u500b\u67e5\u8a62\u5c07\u8fd4\u56de\u5de5\u8cc7\u6700\u9ad8\u7684\u524d 5 \u540d\u54e1\u5de5\u3002<\/p>\n
3. \u4f7f\u7528 LIMIT \u5b50\u53e5<\/h2>\n
\u5728 MySQL \u548c PostgreSQL \u4e2d\uff0cLIMIT \u5b50\u53e5\u7528\u65bc\u9650\u5236\u67e5\u8a62\u7d50\u679c\u7684\u884c\u6578\u3002\u5176\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n
SELECT column1, column2, ...\nFROM table_name\nWHERE condition\nLIMIT number;<\/code><\/pre>\n
\u4f8b\u5982\uff0c\u82e5\u8981\u5f9e Employees \u8cc7\u6599\u8868\u4e2d\u6aa2\u7d22\u524d 5 \u540d\u54e1\u5de5\u7684\u59d3\u540d\u548c\u5de5\u8cc7\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u67e5\u8a62\uff1a<\/p>\n
SELECT Name, Salary\nFROM Employees\nORDER BY Salary DESC\nLIMIT 5;<\/code><\/pre>\n
\u9019\u500b\u67e5\u8a62\u7684\u7d50\u679c\u8207\u4f7f\u7528 TOP \u5b50\u53e5\u7684\u7d50\u679c\u76f8\u540c\uff0c\u4f46\u8a9e\u6cd5\u4e0a\u6709\u6240\u4e0d\u540c\u3002<\/p>\n
4. \u4f7f\u7528 ROWNUM \u5b50\u53e5<\/h2>\n
\u5728 Oracle \u8cc7\u6599\u5eab\u4e2d\uff0cROWNUM \u662f\u4e00\u500b\u7279\u6b8a\u7684\u4f3a\u670d\u5668\u7aef\u8b8a\u6578\uff0c\u7528\u65bc\u9650\u5236\u67e5\u8a62\u7d50\u679c\u7684\u884c\u6578\u3002\u5176\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n
SELECT column1, column2, ...\nFROM table_name\nWHERE ROWNUM <= number;<\/code><\/pre>\n
\u4f8b\u5982\uff0c\u82e5\u8981\u5f9e Employees \u8cc7\u6599\u8868\u4e2d\u6aa2\u7d22\u524d 5 \u540d\u54e1\u5de5\u7684\u59d3\u540d\u548c\u5de5\u8cc7\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u67e5\u8a62\uff1a<\/p>\n
SELECT Name, Salary\nFROM Employees\nWHERE ROWNUM <= 5\nORDER BY Salary DESC;<\/code><\/pre>\n
\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0cROWNUM \u5728\u67e5\u8a62\u57f7\u884c\u6642\u6703\u88ab\u8a08\u7b97\uff0c\u56e0\u6b64\u5728\u4f7f\u7528 ORDER BY \u5b50\u53e5\u6642\uff0c\u53ef\u80fd\u9700\u8981\u4f7f\u7528\u5b50\u67e5\u8a62\u4f86\u7372\u5f97\u6b63\u78ba\u7684\u7d50\u679c\u3002<\/p>\n
5. \u5c0f\u7d50<\/h2>\n
\u5728 SQL \u4e2d\uff0cTOP\u3001LIMIT \u548c ROWNUM \u5b50\u53e5\u90fd\u662f\u7528\u4f86\u9650\u5236\u67e5\u8a62\u7d50\u679c\u884c\u6578\u7684\u91cd\u8981\u5de5\u5177\u3002\u6839\u64da\u4e0d\u540c\u7684\u8cc7\u6599\u5eab\u7cfb\u7d71\uff0c\u9019\u4e9b\u5b50\u53e5\u7684\u8a9e\u6cd5\u548c\u4f7f\u7528\u65b9\u5f0f\u6709\u6240\u4e0d\u540c\u3002\u4e86\u89e3\u9019\u4e9b\u5dee\u7570\u53ef\u4ee5\u5e6b\u52a9\u958b\u767c\u8005\u66f4\u6709\u6548\u5730\u64b0\u5beb\u67e5\u8a62\uff0c\u4e26\u63d0\u9ad8\u8cc7\u6599\u6aa2\u7d22\u7684\u6548\u7387\u3002<\/p>\n
\u7e3d\u7d50<\/h2>\n
\u5728\u672c\u6587\u4e2d\uff0c\u6211\u5011\u63a2\u8a0e\u4e86 MSSQL \u4e2d\u7684 SQL SELECT TOP\u3001LIMIT \u548c ROWNUM \u5b50\u53e5\uff0c\u4e26\u63d0\u4f9b\u4e86\u76f8\u95dc\u7684\u7bc4\u4f8b\u548c\u61c9\u7528\u5834\u666f\u3002\u9019\u4e9b\u77e5\u8b58\u5c0d\u65bc\u4efb\u4f55\u5e0c\u671b\u63d0\u9ad8\u8cc7\u6599\u5eab\u67e5\u8a62\u6548\u7387\u7684\u958b\u767c\u8005\u4f86\u8aaa\u90fd\u662f\u5fc5\u4e0d\u53ef\u5c11\u7684\u3002\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684 VPS<\/a> \u89e3\u6c7a\u65b9\u6848\uff0cServer.HK \u63d0\u4f9b\u4e86\u591a\u7a2e\u9078\u64c7\uff0c\u9069\u5408\u5404\u7a2e\u9700\u6c42\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u5b66\u4e60 MSSQL \u6559\u7a0b\uff0c\u638c\u63e1 SQL SELECT TOP\u3001LIMIT \u548c ROWNUM \u5b50\u53e5\u7684\u7528\u6cd5\uff0c\u8f7b\u677e\u63d0\u53d6\u6240\u9700\u6570\u636e\u884c\u3002<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-159993","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/159993","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=159993"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/159993\/revisions"}],"predecessor-version":[{"id":159994,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/159993\/revisions\/159994"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=159993"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=159993"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=159993"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}