{"id":160013,"date":"2024-11-03T19:33:20","date_gmt":"2024-11-03T11:33:20","guid":{"rendered":"https:\/\/server.hk\/cnblog\/160013\/"},"modified":"2024-11-03T19:33:21","modified_gmt":"2024-11-03T11:33:21","slug":"mssql-%e6%95%99%e7%a8%8b-sql-%e8%aa%9e%e6%b3%95","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/160013\/","title":{"rendered":"MSSQL \u6559\u7a0b SQL \u8a9e\u6cd5"},"content":{"rendered":"

MSSQL \u6559\u7a0b SQL \u8a9e\u6cd5<\/h1>\n

\u5728\u7576\u4eca\u7684\u6578\u64da\u9a45\u52d5\u4e16\u754c\u4e2d\uff0cMicrosoft SQL Server\uff08MSSQL\uff09\u662f\u4e00\u500b\u5ee3\u6cdb\u4f7f\u7528\u7684\u95dc\u806f\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\u3002\u5b83\u63d0\u4f9b\u4e86\u5f37\u5927\u7684\u6578\u64da\u5b58\u5132\u3001\u6aa2\u7d22\u548c\u7ba1\u7406\u529f\u80fd\uff0c\u4e26\u4e14\u652f\u6301\u591a\u7a2e SQL \u8a9e\u6cd5\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e MSSQL \u7684\u57fa\u672c SQL \u8a9e\u6cd5\uff0c\u5e6b\u52a9\u8b80\u8005\u66f4\u597d\u5730\u7406\u89e3\u548c\u4f7f\u7528\u9019\u4e00\u5f37\u5927\u7684\u5de5\u5177\u3002<\/p>\n

\u4ec0\u9ebc\u662f SQL \u8a9e\u6cd5\uff1f<\/h2>\n

SQL\uff08\u7d50\u69cb\u5316\u67e5\u8a62\u8a9e\u8a00\uff09\u662f\u4e00\u7a2e\u7528\u65bc\u7ba1\u7406\u548c\u64cd\u4f5c\u95dc\u806f\u6578\u64da\u5eab\u7684\u6a19\u6e96\u8a9e\u8a00\u3002MSSQL \u4f7f\u7528 SQL \u8a9e\u6cd5\u4f86\u57f7\u884c\u5404\u7a2e\u6578\u64da\u64cd\u4f5c\uff0c\u5305\u62ec\u67e5\u8a62\u3001\u63d2\u5165\u3001\u66f4\u65b0\u548c\u522a\u9664\u6578\u64da\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u57fa\u672c\u7684 SQL \u8a9e\u6cd5\u7d50\u69cb\uff1a<\/p>\n

1. SELECT \u8a9e\u53e5<\/h3>\n

SELECT \u8a9e\u53e5\u7528\u65bc\u5f9e\u6578\u64da\u5eab\u4e2d\u6aa2\u7d22\u6578\u64da\u3002\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n

SELECT column1, column2\nFROM table_name\nWHERE condition;<\/code><\/pre>\n
\u4f8b\u5982\uff0c\u82e5\u8981\u5f9e\u540d\u70ba “Employees” \u7684\u8868\u4e2d\u9078\u64c7\u6240\u6709\u54e1\u5de5\u7684\u59d3\u540d\u548c\u8077\u4f4d\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u8a9e\u53e5\uff1a<\/p>\n
SELECT Name, Position\nFROM Employees;<\/code><\/pre>\n
2. INSERT \u8a9e\u53e5<\/h3>\n
INSERT \u8a9e\u53e5\u7528\u65bc\u5411\u6578\u64da\u5eab\u4e2d\u63d2\u5165\u65b0\u6578\u64da\u3002\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n
INSERT INTO table_name (column1, column2)\nVALUES (value1, value2);<\/code><\/pre>\n
\u4f8b\u5982\uff0c\u82e5\u8981\u5411 “Employees” \u8868\u4e2d\u63d2\u5165\u4e00\u540d\u65b0\u54e1\u5de5\u7684\u8cc7\u6599\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u8a9e\u53e5\uff1a<\/p>\n
INSERT INTO Employees (Name, Position)\nVALUES ('John Doe', 'Developer');<\/code><\/pre>\n
3. UPDATE \u8a9e\u53e5<\/h3>\n
UPDATE \u8a9e\u53e5\u7528\u65bc\u66f4\u65b0\u6578\u64da\u5eab\u4e2d\u5df2\u5b58\u5728\u7684\u6578\u64da\u3002\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n
UPDATE table_name\nSET column1 = value1, column2 = value2\nWHERE condition;<\/code><\/pre>\n
\u4f8b\u5982\uff0c\u82e5\u8981\u5c07 “John Doe” \u7684\u8077\u4f4d\u66f4\u65b0\u70ba “Senior Developer”\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u8a9e\u53e5\uff1a<\/p>\n
UPDATE Employees\nSET Position = 'Senior Developer'\nWHERE Name = 'John Doe';<\/code><\/pre>\n
4. DELETE \u8a9e\u53e5<\/h3>\n
DELETE \u8a9e\u53e5\u7528\u65bc\u5f9e\u6578\u64da\u5eab\u4e2d\u522a\u9664\u6578\u64da\u3002\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n
DELETE FROM table_name\nWHERE condition;<\/code><\/pre>\n
\u4f8b\u5982\uff0c\u82e5\u8981\u522a\u9664\u540d\u70ba “John Doe” \u7684\u54e1\u5de5\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u8a9e\u53e5\uff1a<\/p>\n
DELETE FROM Employees\nWHERE Name = 'John Doe';<\/code><\/pre>\n
\u9032\u968e SQL \u8a9e\u6cd5<\/h2>\n
\u9664\u4e86\u57fa\u672c\u7684 SQL \u8a9e\u6cd5\u5916\uff0cMSSQL \u9084\u652f\u6301\u4e00\u4e9b\u9032\u968e\u529f\u80fd\uff0c\u4f8b\u5982 JOIN\u3001GROUP BY \u548c ORDER BY\u3002<\/p>\n
1. JOIN \u8a9e\u53e5<\/h3>\n
JOIN \u8a9e\u53e5\u7528\u65bc\u5f9e\u591a\u500b\u8868\u4e2d\u6aa2\u7d22\u6578\u64da\u3002\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n
SELECT columns\nFROM table1\nJOIN table2\nON table1.common_column = table2.common_column;<\/code><\/pre>\n
\u4f8b\u5982\uff0c\u82e5\u8981\u5f9e “Employees” \u8868\u548c “Departments” \u8868\u4e2d\u6aa2\u7d22\u54e1\u5de5\u53ca\u5176\u6240\u5c6c\u90e8\u9580\u7684\u8cc7\u6599\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u8a9e\u53e5\uff1a<\/p>\n
SELECT Employees.Name, Departments.DepartmentName\nFROM Employees\nJOIN Departments\nON Employees.DepartmentID = Departments.ID;<\/code><\/pre>\n
2. GROUP BY \u8a9e\u53e5<\/h3>\n
GROUP BY \u8a9e\u53e5\u7528\u65bc\u5c07\u7d50\u679c\u96c6\u4e2d\u7684\u6578\u64da\u5206\u7d44\u3002\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n
SELECT column, COUNT(*)\nFROM table_name\nGROUP BY column;<\/code><\/pre>\n
\u4f8b\u5982\uff0c\u82e5\u8981\u8a08\u7b97\u6bcf\u500b\u90e8\u9580\u7684\u54e1\u5de5\u6578\u91cf\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u8a9e\u53e5\uff1a<\/p>\n
SELECT DepartmentID, COUNT(*)\nFROM Employees\nGROUP BY DepartmentID;<\/code><\/pre>\n
3. ORDER BY \u8a9e\u53e5<\/h3>\n
ORDER BY \u8a9e\u53e5\u7528\u65bc\u5c0d\u7d50\u679c\u96c6\u9032\u884c\u6392\u5e8f\u3002\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n
SELECT columns\nFROM table_name\nORDER BY column ASC|DESC;<\/code><\/pre>\n
\u4f8b\u5982\uff0c\u82e5\u8981\u6309\u54e1\u5de5\u59d3\u540d\u7684\u5b57\u6bcd\u9806\u5e8f\u6392\u5e8f\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u8a9e\u53e5\uff1a<\/p>\n
SELECT Name\nFROM Employees\nORDER BY Name ASC;<\/code><\/pre>\n
\u7e3d\u7d50<\/h2>\n
MSSQL \u63d0\u4f9b\u4e86\u5f37\u5927\u7684 SQL \u8a9e\u6cd5\uff0c\u5e6b\u52a9\u7528\u6236\u6709\u6548\u5730\u7ba1\u7406\u548c\u64cd\u4f5c\u6578\u64da\u3002\u7121\u8ad6\u662f\u57fa\u672c\u7684\u67e5\u8a62\u3001\u63d2\u5165\u3001\u66f4\u65b0\u548c\u522a\u9664\u64cd\u4f5c\uff0c\u9084\u662f\u9032\u968e\u7684\u6578\u64da\u5206\u7d44\u548c\u6392\u5e8f\u529f\u80fd\uff0c\u638c\u63e1\u9019\u4e9b\u8a9e\u6cd5\u90fd\u662f\u4f7f\u7528 MSSQL \u7684\u57fa\u790e\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u6578\u64da\u7ba1\u7406\u7684\u4f01\u696d\u4f86\u8aaa\uff0c\u9078\u64c7\u5408\u9069\u7684 VPS<\/a> \u89e3\u6c7a\u65b9\u6848\u53ef\u4ee5\u9032\u4e00\u6b65\u63d0\u5347\u6578\u64da\u5eab\u7684\u6027\u80fd\u548c\u7a69\u5b9a\u6027\u3002\u4e86\u89e3\u66f4\u591a\u95dc\u65bc \u9999\u6e2f\u4f3a\u670d\u5668<\/a> \u7684\u8cc7\u8a0a\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u5b78\u7fd2 MSSQL \u6559\u7a0b\uff0c\u638c\u63e1 SQL \u8a9e\u6cd5\uff0c\u5f9e\u57fa\u790e\u5230\u9032\u968e\uff0c\u8f15\u9b06\u7ba1\u7406\u6578\u64da\u5eab\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-160013","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/160013","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=160013"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/160013\/revisions"}],"predecessor-version":[{"id":160014,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/160013\/revisions\/160014"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=160013"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=160013"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=160013"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}