{"id":41500,"date":"2023-05-09T08:01:24","date_gmt":"2023-11-11T12:54:15","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/postgresql%e7%9a%84sql%e5%91%bd%e4%bb%a4%e5%88%97%e8%a1%a8\/"},"modified":"2024-04-30T03:17:51","modified_gmt":"2024-04-29T19:17:51","slug":"postgresql%e7%9a%84sql%e5%91%bd%e4%bb%a4%e5%88%97%e8%a1%a8","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/postgresql%e7%9a%84sql%e5%91%bd%e4%bb%a4%e5%88%97%e8%a1%a8\/","title":{"rendered":"PostgreSQL\u7684SQL\u547d\u4ee4\u5217\u8868"},"content":{"rendered":"

SQL \u547d\u4ee4\u5217\u8868<\/h2>\n
\n
\u64cd\u4f5cSQL\u30b3\u30de\u30f3\u30c9\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u4f5c\u6210CREATE DATABASE dbname;<\/code>\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u524a\u9664DROP DATABASE dbname;<\/code>\u30c6\u30fc\u30d6\u30eb\u306e\u4f5c\u6210CREATE TABLE tablename (column1 datatype1, column2 datatype2, ...);<\/code>\u30c6\u30fc\u30d6\u30eb\u306e\u524a\u9664DROP TABLE tablename;<\/code>\u30c6\u30fc\u30d6\u30eb\u306e\u69cb\u9020\u306e\u8868\u793a\\d tablename<\/code> (\u3053\u308c\u306fpsql<\/code>\u30b3\u30de\u30f3\u30c9\u5c02\u7528)\u30c7\u30fc\u30bf\u306e\u633f\u5165INSERT INTO tablename (column1, column2, ...) VALUES (value1, value2, ...);<\/code>\u30c7\u30fc\u30bf\u306e\u9078\u629eSELECT * FROM tablename WHERE conditions;<\/code>\u30c7\u30fc\u30bf\u306e\u66f4\u65b0UPDATE tablename SET column1=value1, column2=value2 WHERE conditions;<\/code>\u30c7\u30fc\u30bf\u306e\u524a\u9664DELETE FROM tablename WHERE conditions;<\/code>\u30ab\u30e9\u30e0\u306e\u8ffd\u52a0ALTER TABLE tablename ADD COLUMN columnname datatype;<\/code>\u30ab\u30e9\u30e0\u306e\u524a\u9664ALTER TABLE tablename DROP COLUMN columnname;<\/code>\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306e\u4f5c\u6210CREATE INDEX indexname ON tablename (columnname);<\/code>\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306e\u524a\u9664DROP INDEX indexname;<\/code>\u30e6\u30fc\u30b6\u30fc\u306e\u4f5c\u6210CREATE USER username WITH PASSWORD 'password';<\/code>\u30e6\u30fc\u30b6\u30fc\u306e\u524a\u9664DROP USER username;<\/code>\u30e6\u30fc\u30b6\u30fc\u306b\u6a29\u9650\u3092\u4ed8\u4e0eGRANT privileges ON object TO username;<\/code>\u30e6\u30fc\u30b6\u30fc\u304b\u3089\u6a29\u9650\u3092\u53d6\u308a\u6d88\u3057REVOKE privileges ON object FROM username;<\/code><\/div>\n<\/div>\n

\u6570\u636e\u7c7b\u578b<\/h2>\n
\n
\u30c7\u30fc\u30bf\u578b\u30ab\u30c6\u30b4\u30ea\u30c7\u30fc\u30bf\u578b\u540d\u8aac\u660e\u6570\u5024\u578b<\/strong>smallint<\/code>2\u30d0\u30a4\u30c8\u6574\u6570\u5024\u3002\u7bc4\u56f2: -32,768 \u304b\u3089 32,767\u3002
\ninteger<\/code>4\u30d0\u30a4\u30c8\u6574\u6570\u5024\u3002\u7bc4\u56f2: -2,147,483,648 \u304b\u3089 2,147,483,647\u3002
\nbigint<\/code>8\u30d0\u30a4\u30c8\u6574\u6570\u5024\u3002\u7bc4\u56f2: -9,223,372,036,854,775,808 \u304b\u3089 9,223,372,036,854,775,807\u3002
\ndecimal<\/code>\u53ef\u5909\u9577\u306e\u6570\u5024\u3002
\nnumeric<\/code>decimal<\/code>\u3068\u540c\u3058\u3002
\nreal<\/code>4\u30d0\u30a4\u30c8\u6d6e\u52d5\u5c0f\u6570\u70b9\u6570\u3002
\ndouble precision<\/code>8\u30d0\u30a4\u30c8\u6d6e\u52d5\u5c0f\u6570\u70b9\u6570\u3002\u6587\u5b57\u578b<\/strong>char(n)<\/code>\u56fa\u5b9a\u9577\u306e\u6587\u5b57\u5217\u3002
\nvarchar(n)<\/code>\u53ef\u5909\u9577\u306e\u6587\u5b57\u5217\u3002
\ntext<\/code>\u53ef\u5909\u9577\u306e\u6587\u5b57\u5217\uff08\u6700\u5927\u9577\u3055\u5236\u9650\u306a\u3057\uff09\u3002\u65e5\u6642\u578b<\/strong>timestamp<\/code>\u65e5\u4ed8\u3068\u6642\u9593\u3092\u5408\u308f\u305b\u3066\u4fdd\u6301\u3059\u308b\u30c7\u30fc\u30bf\u578b\u3002
\ndate<\/code>\u65e5\u4ed8\u306e\u307f\u3092\u4fdd\u6301\u3059\u308b\u30c7\u30fc\u30bf\u578b\u3002
\ntime<\/code>\u6642\u9593\u306e\u307f\u3092\u4fdd\u6301\u3059\u308b\u30c7\u30fc\u30bf\u578b\u3002\u8ad6\u7406\u578b<\/strong>boolean<\/code>\u771f\u507d\u5024\uff08true<\/code>\u3001false<\/code>\u3001null<\/code>\uff09\u3002\u5217\u6319\u578b<\/strong>Enum\u4e8b\u524d\u306b\u5b9a\u7fa9\u3057\u305f\u9805\u76ee\u306e\u4e00\u3064\u306e\u307f\u3092\u5024\u3068\u3057\u3066\u6301\u3064\u3053\u3068\u304c\u3067\u304d\u308b\u30c7\u30fc\u30bf\u578b\u3002\u7528\u9014\u306b\u5fdc\u3058\u3066\u30e6\u30fc\u30b6\u30fc\u304c\u5b9a\u7fa9\u3057\u307e\u3059\u3002\u5e7e\u4f55\u578b<\/strong>\u4f8b: point<\/code>\u4f4d\u7f6e\u70b9\u3084\u7dda\u3001\u30dc\u30c3\u30af\u30b9\u306a\u3069\u306e\u7a7a\u9593\u30c7\u30fc\u30bf\u3092\u6271\u3046\u305f\u3081\u306e\u30c7\u30fc\u30bf\u578b\u3002\u5404\u7a2e\u306e\u5e7e\u4f55\u578b\u304c\u3042\u308a\u307e\u3059\u3002\u30d3\u30c3\u30c8\u6587\u5b57\u5217\u578b<\/strong>bit(n)<\/code>\u56fa\u5b9a\u9577\u306e\u30d3\u30c3\u30c8\u6587\u5b57\u5217\u3002
\nbit varying(n)<\/code>\u53ef\u5909\u9577\u306e\u30d3\u30c3\u30c8\u6587\u5b57\u5217\u3002\u30d0\u30a4\u30ca\u30ea\u30c7\u30fc\u30bf\u578b<\/strong>bytea<\/code>\u30d0\u30a4\u30ca\u30ea\u30c7\u30fc\u30bf\u3092\u4fdd\u6301\u3059\u308b\u30c7\u30fc\u30bf\u578b\u3002UUID\u578b<\/strong>uuid<\/code>\u30e6\u30cb\u30d0\u30fc\u30b5\u30eb\u4e00\u610f\u8b58\u5225\u5b50 (UUID) \u3092\u4fdd\u6301\u3059\u308b\u30c7\u30fc\u30bf\u578b\u3002\u914d\u5217<\/strong>\u4f8b: integer[]<\/code>\u540c\u3058\u30c7\u30fc\u30bf\u578b\u306e\u8907\u6570\u306e\u8981\u7d20\u30921\u3064\u306e\u30ab\u30e9\u30e0\u3067\u4fdd\u6301\u3059\u308b\u305f\u3081\u306e\u30c7\u30fc\u30bf\u578b\u3002\u30c7\u30fc\u30bf\u578b\u306e\u5f8c\u306b[]<\/code>\u3092\u4ed8\u3051\u308b\u3053\u3068\u3067\u914d\u5217\u3068\u3057\u3066\u5b9a\u7fa9\u3057\u307e\u3059\u3002JSON\u578b<\/strong>json<\/code>JSON\u30c7\u30fc\u30bf\u3092\u30c6\u30ad\u30b9\u30c8\u3068\u3057\u3066\u4fdd\u6301\u3059\u308b\u30c7\u30fc\u30bf\u578b\u3002
\njsonb<\/code>JSON\u30c7\u30fc\u30bf\u3092\u30d0\u30a4\u30ca\u30ea\u5f62\u5f0f\u3067\u4fdd\u6301\u3059\u308b\u30c7\u30fc\u30bf\u578b\u3002<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

SQL \u547d\u4ee4\u5217\u8868 \u64cd\u4f5cSQL\u30b3\u30de\u30f3\u30c9\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u4f5c\u6210CREATE DATABASE dbname;\u30c7\u30fc\u30bf\u30d9\u30fc […]<\/p>\n","protected":false},"author":10,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-41500","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"\nPostgreSQL\u7684SQL\u547d\u4ee4\u5217\u8868 - Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/zh\/blog\/postgresql\u7684sql\u547d\u4ee4\u5217\u8868\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"PostgreSQL\u7684SQL\u547d\u4ee4\u5217\u8868\" \/>\n<meta property=\"og:description\" content=\"SQL \u547d\u4ee4\u5217\u8868 \u64cd\u4f5cSQL\u30b3\u30de\u30f3\u30c9\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u4f5c\u6210CREATE DATABASE dbname;\u30c7\u30fc\u30bf\u30d9\u30fc […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/postgresql\u7684sql\u547d\u4ee4\u5217\u8868\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - 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