{"id":903,"date":"2023-11-13T18:43:58","date_gmt":"2023-04-18T19:44:30","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/index.php\/2023\/11\/30\/sql-%e6%95%b0%e6%8d%ae%e7%b1%bb%e5%9e%8b\/"},"modified":"2025-08-03T17:14:28","modified_gmt":"2025-08-03T09:14:28","slug":"sql-%e6%95%b0%e6%8d%ae%e7%b1%bb%e5%9e%8b","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/sql-%e6%95%b0%e6%8d%ae%e7%b1%bb%e5%9e%8b\/","title":{"rendered":"SQL\u6570\u636e\u7c7b\u578b\u5b8c\u5168\u6307\u5357\uff1a\u638c\u63e1\u6570\u636e\u5e93\u8bbe\u8ba1\u4e2d\u7684\u6838\u5fc3\u6570\u636e\u7c7b\u578b"},"content":{"rendered":"

SQL\u6570\u636e\u7c7b\u578b\u6982\u8ff0<\/h2>\n

SQL\u6570\u636e\u7c7b\u578b\u5b9a\u4e49\u4e86\u53ef\u4ee5\u5b58\u50a8\u5728\u8868\u5217\u4e2d\u7684\u503c\u7684\u7c7b\u578b\u3002\u4f8b\u5982\uff0c\u5982\u679c\u4f60\u60f3\u8981\u4e00\u4e2a\u5217\u53ea\u5b58\u50a8\u6574\u6570\u503c\uff0c\u4f60\u53ef\u4ee5\u5c06\u5b83\u7684\u6570\u636e\u7c7b\u578b\u5b9a\u4e49\u4e3aINT\u3002<\/p>\n

SQL\u7684\u6570\u636e\u7c7b\u578b\u53ef\u4ee5\u5927\u81f4\u5206\u4e3a\u4ee5\u4e0b\u51e0\u4e2a\u7c7b\u522b\uff1a<\/p>\n

    \n
  1. \u6570\u503c\u6570\u636e\u7c7b\u578b\uff0c\u5982\uff1aINT\u3001TINYINT\u3001BIGINT\u3001FLOAT\u3001REAL\u7b49\u3002<\/li>\n
  2. \u65e5\u671f\u548c\u65f6\u95f4\u6570\u636e\u7c7b\u578b\uff0c\u5982\uff1aDATE\u3001TIME\u3001DATETIME\u7b49\u3002<\/li>\n
  3. \u5b57\u7b26\u548c\u5b57\u7b26\u4e32\u6570\u636e\u7c7b\u578b\uff0c\u5982\uff1aCHAR\u3001VARCHAR\u3001TEXT\u7b49\u3002<\/li>\n
  4. Unicode\u5b57\u7b26\u5b57\u7b26\u4e32\u6570\u636e\u7c7b\u578b\uff0c\u5982\uff1aNCHAR\u3001NVARCHAR\u3001NTEXT\u7b49\u3002<\/li>\n
  5. \u4e8c\u8fdb\u5236\u6570\u636e\u7c7b\u578b\uff0c\u5982\uff1aBINARY\u3001VARBINARY\u7b49\u3002<\/li>\n
  6. \u6742\u9879\u6570\u636e\u7c7b\u578b – CLOB\uff0cBLOB\uff0cXML\uff0cCURSOR\uff0cTABLE\u7b49\u3002<\/li>\n<\/ol>\n

    \u5728\u8fd9\u7bc7\u6587\u7ae0\u4e2d\uff0c\u60a8\u5c06\u4e86\u89e3\u4e0d\u540c\u7c7b\u522b\u7684SQL\u6570\u636e\u7c7b\u578b\u3002<\/p>\n

    \u5173\u7cfb\u6570\u636e\u5e93\u4f9b\u5e94\u5546\u4e4b\u95f4\u7684\u5dee\u5f02<\/h2>\n
    \n

    \u6ce8\u610f<\/p>\n

    \u5e76\u975e\u6bcf\u4e2a\u5173\u7cfb\u578b\u6570\u636e\u5e93\u4f9b\u5e94\u5546\u90fd\u652f\u6301\u6240\u6709\u6570\u636e\u7c7b\u578b\u3002<\/div>\n<\/div>\n

    \u4f8b\u5982\uff0cOracle\u6570\u636e\u5e93\u4e0d\u652f\u6301DATETIME\u7c7b\u578b\uff0c\u800cMySQL\u4e0d\u652f\u6301CLOB\u7c7b\u578b\u3002\u5728\u8bbe\u8ba1\u6570\u636e\u5e93\u67b6\u6784\u548c\u7f16\u5199SQL\u67e5\u8be2\u65f6\uff0c\u8bf7\u786e\u4fdd\u68c0\u67e5\u6570\u636e\u7c7b\u578b\u662f\u5426\u88ab\u652f\u6301\u3002<\/p>\n

    \n

    \u6ce8\u610f<\/p>\n

    \u8fd9\u91cc\u5217\u51fa\u7684\u6570\u636e\u7c7b\u578b\u5e76\u4e0d\u5305\u62ec\u5168\u90e8\u7684\u6570\u636e\u7c7b\u578b\u3002\u8fd9\u4e9b\u662f\u6700\u5e38\u7528\u7684\u6570\u636e\u7c7b\u578b\u3002\u4e00\u4e9b\u5173\u7cfb\u578b\u6570\u636e\u5e93\u4f9b\u5e94\u5546\u53ef\u80fd\u6709\u81ea\u5df1\u7684\u6570\u636e\u7c7b\u578b\uff0c\u53ef\u80fd\u672a\u5728\u6b64\u5904\u5217\u51fa\u3002<\/div>\n<\/div>\n

    \u4f8b\u5982\uff0cMicrosoft SQL Server\u5177\u6709MONEY\u548cSMALLMONEY\u6570\u636e\u7c7b\u578b\uff0c\u4f46\u7531\u4e8e\u5b83\u4eec\u4e0d\u53d7\u5176\u4ed6\u6d41\u884c\u6570\u636e\u5e93\u4f9b\u5e94\u5546\u652f\u6301\uff0c\u5b83\u4eec\u4e0d\u5728\u6b64\u5217\u51fa\u3002<\/p>\n

    \n

    \u6ce8\u610f<\/p>\n

    \u6bcf\u4e2a\u5173\u7cfb\u578b\u6570\u636e\u5e93\u4f9b\u5e94\u5546\u90fd\u5bf9\u4e0d\u540c\u7684\u6570\u636e\u7c7b\u578b\u6709\u5176\u81ea\u5df1\u7684\u6700\u5927\u5927\u5c0f\u9650\u5236\u3002<\/div>\n<\/div>\n

    \u786e\u4fdd\u4e3a\u60a8\u7684\u7279\u5b9a\u573a\u666f\u9009\u62e9\u9002\u5f53\u7684\u6570\u636e\u7c7b\u578b\u3002<\/p>\n

    SQL \u6570\u636e\u7c7b\u578b – \u6570\u503c\u7c7b\u578b<\/h2>\n
    \n\n\n\n\n\n\n\n\n\n\n\n\n\n
    \u6570\u636e\u7c7b\u578b<\/th>\n\u6700\u5c0f\u503c<\/th>\n\u6700\u5927\u503c<\/th>\n<\/tr>\n<\/thead>\n
    BIT<\/td>\n0<\/td>\n1<\/td>\n<\/tr>\n
    TINYINT<\/td>\n0<\/td>\n255<\/td>\n<\/tr>\n
    SMALLINT<\/td>\n-32,768<\/td>\n32,767<\/td>\n<\/tr>\n
    INT<\/td>\n-2,147,483,648<\/td>\n2,147,483,647<\/td>\n<\/tr>\n
    BIGINT<\/td>\n-9,223,372,036,854,775,808<\/td>\n9,223,372,036,854,775,807<\/td>\n<\/tr>\n
    DECIMAL<\/td>\n-10^38 + 1<\/td>\n10^38 – 1<\/td>\n<\/tr>\n
    NUMERIC<\/td>\n-10^38 + 1<\/td>\n10^38 – 1<\/td>\n<\/tr>\n
    FLOAT<\/td>\n-1.79E+308<\/td>\n1.79E+308<\/td>\n<\/tr>\n
    REAL<\/td>\n-3.40E+38<\/td>\n3.40E+38<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

    SQL\u65e5\u671f\u548c\u65f6\u95f4\u6570\u636e\u7c7b\u578b<\/h2>\n
    \n\n\n\n\n\n\n\n\n\n
    \u6570\u636e\u7c7b\u578b<\/th>\n\u63cf\u8ff0<\/th>\n<\/tr>\n<\/thead>\n
    DATE<\/td>\n\u4ee5YYYY-MM-DD<\/code>\u683c\u5f0f\u5b58\u50a8\u65e5\u671f<\/td>\n<\/tr>\n
    TIME<\/td>\n\u4ee5HH:MI:SS<\/code>\u683c\u5f0f\u5b58\u50a8\u65f6\u95f4<\/td>\n<\/tr>\n
    DATETIME<\/td>\n\u4ee5YYYY-MM-DD HH:MI:SS<\/code>\u683c\u5f0f\u5b58\u50a8\u65e5\u671f\u548c\u65f6\u95f4\u4fe1\u606f<\/td>\n<\/tr>\n
    TIMESTAMP<\/td>\n\u5b58\u50a8\u81eaUnix\u7eaa\u5143\uff08'1970-01-01 00:00:00' UTC<\/code>\uff09\u4ee5\u6765\u7ecf\u8fc7\u7684\u79d2\u6570<\/td>\n<\/tr>\n
    YEAR<\/td>\n\u4ee52\u4f4d\u62164\u4f4d\u683c\u5f0f\u5b58\u50a8\u5e74\u4efd\u30024\u4f4d\u683c\u5f0f\u8303\u56f4\u4e3a1901\u81f32155\u30022\u4f4d\u683c\u5f0f\u8303\u56f4\u4e3a70\u81f369\uff0c\u8868\u793a1970\u81f32069\u5e74\u3002<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

    SQL\u5b57\u7b26\u548c\u5b57\u7b26\u4e32\u6570\u636e\u7c7b\u578b<\/h2>\n
    \n\n\n\n\n\n\n\n\n
    \u6570\u636e\u7c7b\u578b<\/th>\n\u63cf\u8ff0<\/th>\n<\/tr>\n<\/thead>\n
    CHAR<\/td>\n\u56fa\u5b9a\u957f\u5ea6\uff0c\u6700\u5927\u957f\u5ea6\u4e3a8,000\u4e2a\u5b57\u7b26<\/td>\n<\/tr>\n
    VARCHAR<\/td>\n\u53ef\u53d8\u957f\u5ea6\u5b58\u50a8\uff0c\u6700\u5927\u957f\u5ea6\u4e3a8,000\u4e2a\u5b57\u7b26<\/td>\n<\/tr>\n
    VARCHAR(max)<\/td>\n\u53ef\u53d8\u957f\u5ea6\u5b58\u50a8\uff0c\u5177\u6709\u6307\u5b9a\u7684\u6700\u5927\u5b57\u7b26\u6570\uff0cMySQL\u4e2d\u4e0d\u652f\u6301<\/td>\n<\/tr>\n
    TEXT<\/td>\n\u53ef\u53d8\u957f\u5ea6\u5b58\u50a8\uff0c\u6700\u5927\u5927\u5c0f\u4e3a2GB\u6570\u636e<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
    \n

    \u6ce8\u610f<\/p>\n

    \u8fd9\u4e9b\u6570\u636e\u7c7b\u578b\u9002\u7528\u4e8e\u5b57\u7b26\u6d41\uff0c\u4e0d\u5e94\u4e0eUnicode\u6570\u636e\u4e00\u8d77\u4f7f\u7528\u3002<\/div>\n<\/div>\n

    SQL\u7684Unicode\u5b57\u7b26\u548c\u5b57\u7b26\u4e32\u6570\u636e\u7c7b\u578b<\/h2>\n
    \n\n\n\n\n\n\n\n\n
    \u6570\u636e\u7c7b\u578b<\/th>\n\u63cf\u8ff0<\/th>\n<\/tr>\n<\/thead>\n
    NCHAR<\/td>\n\u56fa\u5b9a\u957f\u5ea6\uff0c\u6700\u5927\u957f\u5ea6\u4e3a4,000\u4e2a\u5b57\u7b26<\/td>\n<\/tr>\n
    NVARCHAR<\/td>\n\u53ef\u53d8\u957f\u5ea6\u5b58\u50a8\uff0c\u6700\u5927\u957f\u5ea6\u4e3a4,000\u4e2a\u5b57\u7b26<\/td>\n<\/tr>\n
    NVARCHAR(max)<\/td>\n\u53ef\u53d8\u957f\u5ea6\u5b58\u50a8\uff0c\u5177\u6709\u6307\u5b9a\u7684\u6700\u5927\u5b57\u7b26\u6570<\/td>\n<\/tr>\n
    NTEXT<\/td>\n\u53ef\u53d8\u957f\u5ea6\u5b58\u50a8\uff0c\u6700\u5927\u5927\u5c0f\u4e3a1GB\u6570\u636e<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
    \n

    \u6ce8\u610f<\/p>\n

    MySQL\u6570\u636e\u5e93\u4e0d\u652f\u6301\u8fd9\u4e9b\u6570\u636e\u7c7b\u578b\u3002<\/div>\n<\/div>\n

    SQL\u7684\u4e8c\u8fdb\u5236\u6570\u636e\u7c7b\u578b<\/h2>\n
    \n\n\n\n\n\n\n\n\n
    \u6570\u636e\u7c7b\u578b<\/th>\n\u63cf\u8ff0<\/th>\n<\/tr>\n<\/thead>\n
    BINARY<\/td>\n\u56fa\u5b9a\u957f\u5ea6\uff0c\u6700\u5927\u957f\u5ea6\u4e3a8,000\u5b57\u8282<\/td>\n<\/tr>\n
    VARBINARY<\/td>\n\u53ef\u53d8\u957f\u5ea6\u5b58\u50a8\uff0c\u6700\u5927\u957f\u5ea6\u4e3a8,000\u5b57\u8282<\/td>\n<\/tr>\n
    VARBINARY(max)<\/td>\n\u53ef\u53d8\u957f\u5ea6\u5b58\u50a8\uff0c\u5177\u6709\u6307\u5b9a\u7684\u6700\u5927\u5b57\u8282\u6570<\/td>\n<\/tr>\n
    IMAGE<\/td>\n\u53ef\u53d8\u957f\u5ea6\u5b58\u50a8\uff0c\u6700\u5927\u5927\u5c0f\u4e3a2 GB\u4e8c\u8fdb\u5236\u6570\u636e<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

    SQL \u6742\u9879\u6570\u636e\u7c7b\u578b<\/h2>\n
    \n\n\n\n\n\n\n\n\n
    \u6570\u636e\u7c7b\u578b<\/th>\n\u63cf\u8ff0<\/th>\n<\/tr>\n<\/thead>\n
    CLOB<\/td>\n\u5b57\u7b26\u5927\u5bf9\u8c61\uff0c\u6700\u591a\u53ef\u5bb9\u7eb32 GB\u6570\u636e<\/td>\n<\/tr>\n
    BLOB<\/td>\n\u7528\u4e8e\u5927\u578b\u4e8c\u8fdb\u5236\u5bf9\u8c61<\/td>\n<\/tr>\n
    XML<\/td>\n\u7528\u4e8e\u5b58\u50a8XML\u6570\u636e<\/td>\n<\/tr>\n
    JSON<\/td>\n\u7528\u4e8e\u5b58\u50a8JSON\u6570\u636e<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

    \u7ed3\u8bba<\/h2>\n

    \u5728\u8fd9\u7bc7\u6587\u7ae0\u4e2d\uff0c\u4f60\u4e86\u89e3\u4e86\u4e0d\u540c\u7c7b\u522b\u7684SQL\u6570\u636e\u7c7b\u578b\u3002<\/p>\n

    \u7ee7\u7eed\u5b66\u4e60\u66f4\u591a\u7684SQL\u6559\u7a0b\u3002<\/p>\n

    \u53c2\u8003\u6587\u732e<\/h3>\n
      \n
    • Oracle\u6570\u636e\u5e93\u6570\u636e\u7c7b\u578b<\/li>\n
    • MySQL\u6570\u636e\u7c7b\u578b<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"

      SQL\u6570\u636e\u7c7b\u578b\u6982\u8ff0 SQL\u6570\u636e\u7c7b\u578b\u5b9a\u4e49\u4e86\u53ef\u4ee5\u5b58\u50a8\u5728\u8868\u5217\u4e2d\u7684\u503c\u7684\u7c7b\u578b\u3002\u4f8b\u5982\uff0c\u5982\u679c\u4f60\u60f3\u8981\u4e00\u4e2a\u5217\u53ea\u5b58\u50a8\u6574\u6570\u503c\uff0c\u4f60\u53ef\u4ee5 […]<\/p>\n","protected":false},"author":6,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[488,2321,2322,1406,2323],"class_list":{"0":"post-903","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"hentry","6":"category-uncategorized","7":"tag-sql","9":"tag-2322","10":"tag-1406","11":"tag-2323"},"yoast_head":"\nSQL\u6570\u636e\u7c7b\u578b\u5b8c\u5168\u6307\u5357\uff1a\u638c\u63e1\u6570\u636e\u5e93\u8bbe\u8ba1\u4e2d\u7684\u6838\u5fc3\u6570\u636e\u7c7b\u578b - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"\u5168\u9762\u89e3\u6790SQL\u4e2d\u7684\u5404\u79cd\u6570\u636e\u7c7b\u578b\uff0c\u5305\u62ec\u6570\u503c\u578b\u3001\u5b57\u7b26\u578b\u3001\u65e5\u671f\u65f6\u95f4\u578b\u7b49\u3002\u672c\u6307\u5357\u8be6\u7ec6\u4ecb\u7ecd\u6bcf\u79cd\u6570\u636e\u7c7b\u578b\u7684\u7279\u70b9\u3001\u4f7f\u7528\u573a\u666f\u53ca\u6700\u4f73\u5b9e\u8df5\uff0c\u52a9\u60a8\u4f18\u5316\u6570\u636e\u5e93\u7ed3\u6784\u8bbe\u8ba1\uff0c\u63d0\u5347\u67e5\u8be2\u6027\u80fd\u3002\" \/>\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\/sql-\u6570\u636e\u7c7b\u578b\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"SQL\u6570\u636e\u7c7b\u578b\u5b8c\u5168\u6307\u5357\uff1a\u638c\u63e1\u6570\u636e\u5e93\u8bbe\u8ba1\u4e2d\u7684\u6838\u5fc3\u6570\u636e\u7c7b\u578b\" \/>\n<meta property=\"og:description\" content=\"\u5168\u9762\u89e3\u6790SQL\u4e2d\u7684\u5404\u79cd\u6570\u636e\u7c7b\u578b\uff0c\u5305\u62ec\u6570\u503c\u578b\u3001\u5b57\u7b26\u578b\u3001\u65e5\u671f\u65f6\u95f4\u578b\u7b49\u3002\u672c\u6307\u5357\u8be6\u7ec6\u4ecb\u7ecd\u6bcf\u79cd\u6570\u636e\u7c7b\u578b\u7684\u7279\u70b9\u3001\u4f7f\u7528\u573a\u666f\u53ca\u6700\u4f73\u5b9e\u8df5\uff0c\u52a9\u60a8\u4f18\u5316\u6570\u636e\u5e93\u7ed3\u6784\u8bbe\u8ba1\uff0c\u63d0\u5347\u67e5\u8be2\u6027\u80fd\u3002\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/sql-\u6570\u636e\u7c7b\u578b\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - 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