{"id":193523,"date":"2024-11-12T22:53:21","date_gmt":"2024-11-12T14:53:21","guid":{"rendered":"https:\/\/server.hk\/cnblog\/193523\/"},"modified":"2024-11-12T22:53:22","modified_gmt":"2024-11-12T14:53:22","slug":"%e5%ad%b8%e7%bf%92%e6%9f%a5%e8%a9%a2mssql%e6%95%b8%e6%93%9a%e5%ba%ab%e7%9a%84%e5%9f%ba%e6%9c%ac%e6%96%b9%e6%b3%95%ef%bc%88mssql%e6%95%b8%e6%93%9a%e5%ba%ab%e6%80%8e%e9%ba%bc%e6%9f%a5%e8%a9%a2%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/193523\/","title":{"rendered":"\u5b78\u7fd2\u67e5\u8a62MSSQL\u6578\u64da\u5eab\u7684\u57fa\u672c\u65b9\u6cd5\uff08mssql\u6578\u64da\u5eab\u600e\u9ebc\u67e5\u8a62\uff09"},"content":{"rendered":"

\u5b78\u7fd2\u67e5\u8a62MSSQL\u6578\u64da\u5eab\u7684\u57fa\u672c\u65b9\u6cd5\uff08mssql\u6578\u64da\u5eab\u600e\u9ebc\u67e5\u8a62\uff09<\/h1>\n

\u5728\u7576\u4eca\u6578\u64da\u9a45\u52d5\u7684\u4e16\u754c\u4e2d\uff0c\u6578\u64da\u5eab\u7684\u67e5\u8a62\u80fd\u529b\u662f\u6bcf\u4f4d\u958b\u767c\u8005\u548c\u6578\u64da\u5206\u6790\u5e2b\u5fc5\u9808\u638c\u63e1\u7684\u57fa\u672c\u6280\u80fd\u4e4b\u4e00\u3002Microsoft SQL Server\uff08MSSQL\uff09\u662f\u4e00\u7a2e\u5ee3\u6cdb\u4f7f\u7528\u7684\u95dc\u4fc2\u578b\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\uff0c\u63d0\u4f9b\u4e86\u5f37\u5927\u7684\u67e5\u8a62\u529f\u80fd\u3002\u672c\u6587\u5c07\u4ecb\u7d39\u4e00\u4e9b\u57fa\u672c\u7684\u67e5\u8a62\u65b9\u6cd5\uff0c\u5e6b\u52a9\u8b80\u8005\u66f4\u597d\u5730\u7406\u89e3\u5982\u4f55\u5728MSSQL\u6578\u64da\u5eab\u4e2d\u9032\u884c\u67e5\u8a62\u3002<\/p>\n

\u57fa\u672c\u67e5\u8a62\u8a9e\u6cd5<\/h2>\n

MSSQL\u7684\u67e5\u8a62\u8a9e\u8a00\u662fSQL\uff08\u7d50\u69cb\u5316\u67e5\u8a62\u8a9e\u8a00\uff09\uff0c\u5176\u57fa\u672c\u67e5\u8a62\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n

SELECT column1, column2, ...\nFROM table_name\nWHERE condition;<\/code><\/pre>\n
\u5728\u9019\u88e1\uff0cSELECT<\/code>\u8a9e\u53e5\u7528\u65bc\u6307\u5b9a\u8981\u67e5\u8a62\u7684\u5217\uff0cFROM<\/code>\u8a9e\u53e5\u7528\u65bc\u6307\u5b9a\u6578\u64da\u4f86\u6e90\u7684\u8868\uff0cWHERE<\/code>\u8a9e\u53e5\u5247\u7528\u65bc\u904e\u6ffe\u6578\u64da\u3002<\/p>\n
\u7bc4\u4f8b\uff1a\u67e5\u8a62\u7279\u5b9a\u5217<\/h3>\n
\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u540d\u70baEmployees<\/code>\u7684\u8868\uff0c\u5305\u542b\u54e1\u5de5\u7684\u59d3\u540d\u548c\u8077\u4f4d\u3002\u82e5\u8981\u67e5\u8a62\u6240\u6709\u54e1\u5de5\u7684\u59d3\u540d\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u8a9e\u53e5\uff1a<\/p>\n
SELECT Name\nFROM Employees;<\/code><\/pre>\n
\u67e5\u8a62\u591a\u500b\u5217<\/h3>\n
\u5982\u679c\u9700\u8981\u67e5\u8a62\u591a\u500b\u5217\uff0c\u4f8b\u5982\u59d3\u540d\u548c\u8077\u4f4d\uff0c\u53ef\u4ee5\u9019\u6a23\u5beb\uff1a<\/p>\n
SELECT Name, Position\nFROM Employees;<\/code><\/pre>\n
\u4f7f\u7528WHERE\u5b50\u53e5\u904e\u6ffe\u6578\u64da<\/h2>\n
\u5728\u67e5\u8a62\u4e2d\u4f7f\u7528WHERE<\/code>\u5b50\u53e5\u53ef\u4ee5\u904e\u6ffe\u51fa\u7b26\u5408\u7279\u5b9a\u689d\u4ef6\u7684\u6578\u64da\u3002\u4f8b\u5982\uff0c\u82e5\u8981\u67e5\u8a62\u6240\u6709\u8077\u4f4d\u70ba\u201c\u7d93\u7406\u201d\u7684\u54e1\u5de5\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u8a9e\u53e5\uff1a<\/p>\n
SELECT Name\nFROM Employees\nWHERE Position = 'Manager';<\/code><\/pre>\n
\u6392\u5e8f\u67e5\u8a62\u7d50\u679c<\/h2>\n
\u4f7f\u7528ORDER BY<\/code>\u5b50\u53e5\u53ef\u4ee5\u5c0d\u67e5\u8a62\u7d50\u679c\u9032\u884c\u6392\u5e8f\u3002\u4ee5\u4e0b\u7bc4\u4f8b\u5c07\u67e5\u8a62\u7d50\u679c\u6309\u59d3\u540d\u5347\u5e8f\u6392\u5217\uff1a<\/p>\n
SELECT Name, Position\nFROM Employees\nORDER BY Name ASC;<\/code><\/pre>\n
\u805a\u5408\u51fd\u6578\u7684\u4f7f\u7528<\/h2>\n
MSSQL\u652f\u6301\u591a\u7a2e\u805a\u5408\u51fd\u6578\uff0c\u4f8b\u5982COUNT<\/code>\u3001SUM<\/code>\u3001AVG<\/code>\u7b49\u3002\u9019\u4e9b\u51fd\u6578\u53ef\u4ee5\u7528\u4f86\u8a08\u7b97\u6578\u64da\u7684\u7d71\u8a08\u4fe1\u606f\u3002\u4f8b\u5982\uff0c\u82e5\u8981\u8a08\u7b97\u516c\u53f8\u4e2d\u54e1\u5de5\u7684\u7e3d\u6578\uff0c\u53ef\u4ee5\u4f7f\u7528\uff1a<\/p>\n
SELECT COUNT(*)\nFROM Employees;<\/code><\/pre>\n
\u5206\u7d44\u67e5\u8a62<\/h2>\n
\u4f7f\u7528GROUP BY<\/code>\u5b50\u53e5\u53ef\u4ee5\u5c07\u67e5\u8a62\u7d50\u679c\u6309\u67d0\u4e00\u5217\u9032\u884c\u5206\u7d44\uff0c\u4e26\u7d50\u5408\u805a\u5408\u51fd\u6578\u9032\u884c\u7d71\u8a08\u3002\u4f8b\u5982\uff0c\u82e5\u8981\u67e5\u8a62\u6bcf\u500b\u8077\u4f4d\u7684\u54e1\u5de5\u6578\u91cf\uff0c\u53ef\u4ee5\u4f7f\u7528\uff1a<\/p>\n
SELECT Position, COUNT(*)\nFROM Employees\nGROUP BY Position;<\/code><\/pre>\n
\u7d50\u5408\u591a\u500b\u689d\u4ef6<\/h2>\n
\u5728WHERE<\/code>\u5b50\u53e5\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u908f\u8f2f\u904b\u7b97\u7b26\uff08\u5982AND<\/code>\u548cOR<\/code>\uff09\u4f86\u7d50\u5408\u591a\u500b\u689d\u4ef6\u3002\u4f8b\u5982\uff0c\u82e5\u8981\u67e5\u8a62\u8077\u4f4d\u70ba\u201c\u7d93\u7406\u201d\u4e14\u59d3\u540d\u4ee5\u201cA\u201d\u958b\u982d\u7684\u54e1\u5de5\uff0c\u53ef\u4ee5\u9019\u6a23\u5beb\uff1a<\/p>\n
SELECT Name\nFROM Employees\nWHERE Position = 'Manager' AND Name LIKE 'A%';<\/code><\/pre>\n
\u5c0f\u7d50<\/h2>\n
\u638c\u63e1MSSQL\u7684\u57fa\u672c\u67e5\u8a62\u65b9\u6cd5\u5c0d\u65bc\u6578\u64da\u7ba1\u7406\u548c\u5206\u6790\u81f3\u95dc\u91cd\u8981\u3002\u901a\u904e\u5b78\u7fd2\u5982\u4f55\u4f7f\u7528SELECT<\/code>\u3001WHERE<\/code>\u3001ORDER BY<\/code>\u3001\u805a\u5408\u51fd\u6578\u53ca\u5206\u7d44\u67e5\u8a62\uff0c\u60a8\u53ef\u4ee5\u6709\u6548\u5730\u5f9e\u6578\u64da\u5eab\u4e2d\u63d0\u53d6\u6240\u9700\u7684\u4fe1\u606f\u3002\u96a8\u8457\u5c0dSQL\u8a9e\u8a00\u7684\u6df1\u5165\u4e86\u89e3\uff0c\u60a8\u5c07\u80fd\u5920\u9032\u884c\u66f4\u8907\u96dc\u7684\u67e5\u8a62\uff0c\u5f9e\u800c\u63d0\u5347\u6578\u64da\u8655\u7406\u7684\u6548\u7387\u3002<\/p>\n
\u5982\u9700\u9032\u4e00\u6b65\u4e86\u89e3\u5982\u4f55\u5728\u96f2\u7aef\u74b0\u5883\u4e2d\u4f7f\u7528MSSQL\u6578\u64da\u5eab\uff0c\u60a8\u53ef\u4ee5\u8003\u616e\u4f7f\u7528\u9999\u6e2fVPS<\/a>\u670d\u52d9\uff0c\u9019\u5c07\u70ba\u60a8\u7684\u6578\u64da\u7ba1\u7406\u63d0\u4f9b\u7a69\u5b9a\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u5b78\u7fd2MSSQL\u6578\u64da\u5eab\u67e5\u8a62\u7684\u57fa\u672c\u65b9\u6cd5\uff0c\u638c\u63e1\u5982\u4f55\u6709\u6548\u6aa2\u7d22\u548c\u7ba1\u7406\u6578\u64da\uff0c\u63d0\u5347\u6578\u64da\u8655\u7406\u80fd\u529b\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-193523","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/193523","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=193523"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/193523\/revisions"}],"predecessor-version":[{"id":193524,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/193523\/revisions\/193524"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=193523"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=193523"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=193523"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}