{"id":74901,"date":"2026-02-10T22:17:05","date_gmt":"2026-02-10T14:17:05","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/74901.html"},"modified":"2026-02-10T22:17:05","modified_gmt":"2026-02-10T14:17:05","slug":"sql%e5%bf%85%e7%9f%a5%e5%bf%85%e4%bc%9a%e9%9b%b6%e5%9f%ba%e7%a1%80%e5%bf%ab%e9%80%9f%e5%85%a5%e9%97%a8_%e7%89%9b%e5%ae%a2%e5%88%b7%e9%a2%98%e6%8c%87%e5%8d%977281","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/74901.html","title":{"rendered":"SQL\u5fc5\u77e5\u5fc5\u4f1a\u96f6\u57fa\u7840\u5feb\u901f\u5165\u95e8_\u725b\u5ba2\u5237\u9898\u6307\u5357:72~81"},"content":{"rendered":"

SQL72\u00a0\u68c0\u7d22\u5e76\u5217\u51fa\u5df2\u8ba2\u8d2d\u4ea7\u54c1\u7684\u6e05\u5355<\/h2>\n

\"\"<\/p>\n

# \u65b9\u6cd5\u4e00：
\nselect order_num,prod_id,quantity
\nfrom OrderItems
\nwhere (prod_id = 'BR01' or prod_id = 'BR02' or prod_id = 'BR03')
\nand quantity >=100;<\/p>\n

# \u65b9\u6cd5\u4e8c：
\nselect order_num,prod_id,quantity
\nfrom OrderItems
\nwhere prod_id in('BR01','BR02','BR03')
\nand quantity >=100;<\/p>\n

# \u65b9\u6cd5\u4e09
\nselect order_num,prod_id,quantity
\nfrom OrderItems
\nwhere prod_id between 'BR01' and 'BR03'
\nand quantity >=100;<\/p>\n\n\u5199\u6cd5\u7b49\u4ef7\u903b\u8f91\u9002\u7528\u573a\u666f<\/tr>\n\n\n\n\n
OR \u591a\u6761\u4ef6<\/td>\n\u4efb\u610f\u4e00\u4e2a\u7b49\u503c\u5339\u914d<\/td>\n\u5c11\u91cf\u56fa\u5b9a\u503c\u3001\u6559\u5b66\u6f14\u793a<\/td>\n<\/tr>\n
IN (\u503c\u5217\u8868)<\/td>\n\u591a OR \u7b80\u5199，\u79bb\u6563\u7b49\u503c\u5339\u914d<\/td>\n\u79bb\u6563\u679a\u4e3e\u503c\u3001\u56fa\u5b9a\u591a\u503c\u5339\u914d<\/td>\n<\/tr>\n
BETWEEN AND<\/td>\n\u95ed\u533a\u95f4\u8303\u56f4\u6bd4\u8f83<\/td>\n\u8fde\u7eed\u6570\u503c \/ \u65e5\u671f \/ \u8fde\u7eed\u7f16\u7801<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

SQL73\u00a0\u8fd4\u56de\u6240\u6709\u4ef7\u683c\u5728 3\u7f8e\u5143\u5230 6\u7f8e\u5143\u4e4b\u95f4\u7684\u4ea7\u54c1\u7684\u540d\u79f0\u548c\u4ef7\u683c<\/h2>\n

\"\"<\/h2>\n

\u65b9\u6cd5\u4e00:<\/h4>\n

select prod_name,prod_price from Products
\nwhere prod_price>=3 and prod_price<=6
\norder by prod_price asc; <\/p>\n

\u65b9\u6cd5\u4e8c:<\/h4>\n

select prod_name,prod_price from Products
\nwhere prod_price BETWEEN 3 AND 6
\norder by prod_price asc; <\/p>\n

SQL74\u00a0\u7ea0\u95192<\/h2>\n

\"\"<\/h2>\n

SELECT vend_name
\nFROM Vendors
\nWHERE vend_country = 'USA' AND vend_state = 'CA'
\nORDER BY vend_name; <\/p>\n

\u4e00\u3001Mysql\u00a0\u8bed\u6cd5\u987a\u5e8f<\/h4>\n\n\u5e8f\u53f7\u5173\u952e\u5b57 \/ \u5b50\u53e5\u6838\u5fc3\u4f5c\u7528\u8bf4\u660e\u5907\u6ce8<\/tr>\n\n\n\n\n\n\n\n\n\n\n\n
1<\/td>\nSELECT [DISTINCT]<\/td>\n\u6307\u5b9a\u67e5\u8be2\u7684\u5217\u3001\u53bb\u91cd\u3001\u805a\u5408\u51fd\u6570<\/td>\n\u67e5\u8be2\u7ed3\u679c\u5217\u5b9a\u4e49，\u53ef\u642d\u914d DISTINCT \u53bb\u91cd<\/td>\n<\/tr>\n
2<\/td>\nFROM<\/td>\n\u6307\u5b9a\u6570\u636e\u6765\u6e90\u7684\u4e3b\u8868<\/td>\n\u5fc5\u9009\u5b50\u53e5，\u5b9a\u4e49\u64cd\u4f5c\u7684\u57fa\u7840\u8868<\/td>\n<\/tr>\n
3<\/td>\nJOIN<\/td>\n\u5173\u8054\u5176\u4ed6\u8868（\u5185\u8fde\u63a5\u3001\u5de6\u8fde\u63a5\u3001\u53f3\u8fde\u63a5\u7b49）<\/td>\n\u591a\u8868\u67e5\u8be2\u4f7f\u7528，\u62fc\u63a5\u5173\u8054\u8868<\/td>\n<\/tr>\n
4<\/td>\nON<\/td>\n\u591a\u8868\u8fde\u63a5\u7684\u5339\u914d\u6761\u4ef6<\/td>\n\u914d\u5408 JOIN \u4f7f\u7528，\u4e0d\u53ef\u5355\u72ec\u5199\u5728 WHERE \u524d<\/td>\n<\/tr>\n
5<\/td>\nWHERE<\/td>\n\u5bf9\u539f\u59cb\u6570\u636e\u884c\u8fdb\u884c\u8fc7\u6ee4<\/td>\n\u8fc7\u6ee4\u57fa\u7840\u8868\u6570\u636e，\u4e0d\u652f\u6301\u805a\u5408\u51fd\u6570<\/td>\n<\/tr>\n
6<\/td>\nGROUP BY<\/td>\n\u5bf9\u6570\u636e\u8fdb\u884c\u5206\u7ec4\u7edf\u8ba1<\/td>\n\u914d\u5408\u805a\u5408\u51fd\u6570（SUM\/COUNT\/AVG \u7b49）\u4f7f\u7528<\/td>\n<\/tr>\n
7<\/td>\nHAVING<\/td>\n\u5bf9\u5206\u7ec4\u540e\u7684\u7ed3\u679c\u8fdb\u884c\u8fc7\u6ee4<\/td>\n\u4ec5\u80fd\u8fc7\u6ee4\u5206\u7ec4 \/ \u805a\u5408\u540e\u6570\u636e，\u53ef\u4f7f\u7528\u805a\u5408\u51fd\u6570<\/td>\n<\/tr>\n
8<\/td>\nUNION<\/td>\n\u5408\u5e76\u591a\u4e2a\u67e5\u8be2\u7ed3\u679c\u96c6<\/td>\n\u5408\u5e76\u53bb\u91cd，UNION ALL \u4e3a\u4e0d\u53bb\u91cd\u5408\u5e76<\/td>\n<\/tr>\n
9<\/td>\nORDER BY<\/td>\n\u5bf9\u6700\u7ec8\u7ed3\u679c\u96c6\u8fdb\u884c\u6392\u5e8f<\/td>\n\u5347\u5e8f ASC\u3001\u964d\u5e8f DESC，\u9ed8\u8ba4 ASC<\/td>\n<\/tr>\n
10<\/td>\nLIMIT<\/td>\n\u9650\u5236\u67e5\u8be2\u8fd4\u56de\u7684\u884c\u6570（\u5206\u9875）<\/td>\nMySQL \u7279\u6709，\u7528\u4e8e\u622a\u53d6\u7ed3\u679c\u6761\u6570<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u4e8c\u3001Mysql\u6267\u884c\u987a\u5e8f<\/h4>\n\n\u5e8f\u53f7\u5173\u952e\u5b57 \/ \u5b50\u53e5\u6838\u5fc3\u4f5c\u7528\u8bf4\u660e\u5173\u952e\u77e5\u8bc6\u70b9<\/tr>\n\n\n\n\n\n\n\n\n\n\n\n
1<\/td>\nFROM<\/td>\n\u52a0\u8f7d\u4e3b\u8868\u5230\u5185\u5b58，\u786e\u5b9a\u6570\u636e\u57fa\u7840\u6e90<\/td>\n\u6267\u884c\u7b2c\u4e00\u6b65，\u5148\u627e\u8868<\/td>\n<\/tr>\n
2<\/td>\nON<\/td>\n\u6267\u884c\u591a\u8868\u8fde\u63a5\u7684\u5339\u914d\u6761\u4ef6\u8fc7\u6ee4<\/td>\n\u5148\u5339\u914d\u5173\u8054\u6761\u4ef6，\u518d\u751f\u6210\u4e34\u65f6\u8868<\/td>\n<\/tr>\n
3<\/td>\nJOIN<\/td>\n\u62fc\u63a5\u5173\u8054\u8868，\u751f\u6210\u591a\u8868\u8054\u5408\u4e34\u65f6\u8868<\/td>\nON \u548c JOIN \u8054\u52a8，\u5b8c\u6210\u8868\u8fde\u63a5<\/td>\n<\/tr>\n
4<\/td>\nWHERE<\/td>\n\u8fc7\u6ee4\u8fde\u63a5\u540e\u7684\u539f\u59cb\u884c\u6570\u636e<\/td>\n\u8fc7\u6ee4\u672a\u5206\u7ec4\u7684\u57fa\u7840\u6570\u636e，\u6548\u7387\u6700\u9ad8<\/td>\n<\/tr>\n
5<\/td>\nGROUP BY<\/td>\n\u5bf9\u8fc7\u6ee4\u540e\u7684\u6570\u636e\u8fdb\u884c\u5206\u7ec4<\/td>\n\u5206\u7ec4\u540e\u5f62\u6210\u5206\u7ec4\u805a\u5408\u7684\u4e34\u65f6\u7ed3\u679c<\/td>\n<\/tr>\n
6<\/td>\nHAVING<\/td>\n\u8fc7\u6ee4\u5206\u7ec4\u5b8c\u6210\u540e\u7684\u805a\u5408\u7ed3\u679c<\/td>\n\u9488\u5bf9\u5206\u7ec4\u540e\u6570\u636e，WHERE \u65e0\u6cd5\u66ff\u4ee3<\/td>\n<\/tr>\n
7<\/td>\nSELECT<\/td>\n\u786e\u5b9a\u6700\u7ec8\u8981\u5c55\u793a\u7684\u5217\u3001\u8ba1\u7b97\u5217\u3001\u805a\u5408\u5217<\/td>\n\u6267\u884c\u5230\u8fd9\u4e00\u6b65\u624d\u786e\u5b9a\u67e5\u8be2\u5217<\/td>\n<\/tr>\n
8<\/td>\nDISTINCT<\/td>\n\u5bf9\u67e5\u8be2\u7ed3\u679c\u8fdb\u884c\u53bb\u91cd\u5904\u7406<\/td>\n\u5728 SELECT \u4e4b\u540e，\u5bf9\u7ed3\u679c\u96c6\u53bb\u91cd<\/td>\n<\/tr>\n
9<\/td>\nUNION<\/td>\n\u5408\u5e76\u591a\u4e2a\u67e5\u8be2\u7684\u7ed3\u679c\u96c6<\/td>\n\u5408\u5e76\u6240\u6709\u6ee1\u8db3\u6761\u4ef6\u7684\u67e5\u8be2\u7ed3\u679c<\/td>\n<\/tr>\n
10<\/td>\nORDER BY<\/td>\n\u5bf9\u6700\u7ec8\u7ed3\u679c\u96c6\u8fdb\u884c\u6392\u5e8f<\/td>\n\u6700\u540e\u6392\u5e8f，\u6392\u5e8f\u662f\u8017\u65f6\u64cd\u4f5c，\u653e\u6700\u540e<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
    \n
  • \u4e66\u5199\u987a\u5e8f \u2260 \u6267\u884c\u987a\u5e8f，WHERE \u5148\u6267\u884c，SELECT \u540e\u6267\u884c，\u6240\u4ee5 WHERE \u91cc\u4e0d\u80fd\u7528 SELECT \u5b9a\u4e49\u7684\u522b\u540d\u3002<\/li>\n
  • ON 🆚\u00a0WHERE：ON \u662f\u8868\u8fde\u63a5\u65f6\u8fc7\u6ee4，WHERE \u662f\u8fde\u63a5\u5b8c\u6210\u540e\u8fc7\u6ee4，\u5de6\u8fde\u63a5 \/ \u53f3\u8fde\u63a5\u65f6，\u4e8c\u8005\u7ed3\u679c\u4f1a\u4e0d\u540c\u3002<\/li>\n
  • WHERE 🆚\u00a0HAVING：WHERE \u8fc7\u6ee4\u539f\u59cb\u884c，\u4e0d\u80fd\u7528\u805a\u5408\u51fd\u6570；HAVING \u8fc7\u6ee4\u5206\u7ec4\u7ed3\u679c，\u53ea\u80fd\u914d\u5408 GROUP BY \u4f7f\u7528\u3002<\/li>\n
  • ORDER BY\u3001LIMIT \u6c38\u8fdc\u5728\u6267\u884c\u7684\u6700\u540e\u9636\u6bb5，\u662f\u5bf9\u6700\u7ec8\u7ed3\u679c\u96c6\u64cd\u4f5c\u3002<\/li>\n<\/ul>\n

    SQL75\u00a0\u68c0\u7d22\u4ea7\u54c1\u540d\u79f0\u548c\u63cf\u8ff0（\u4e00）<\/h2>\n

    \"\"<\/p>\n

    select prod_name,prod_desc from Products
    \nwhere prod_desc like '%toy%'; <\/p>\n

    \u5173\u952e\u8bcd：like<\/span><\/p>\n

    \u7528\u6cd5：[\u5b57\u7b26] like '%_[]\u5b57\u7b26'<\/p>\n

      \n
    • %\u8868\u793a\u4efb\u4f55\u5b57\u7b26\u51fa\u73b0\u4efb\u610f\u6b21\u6570<\/li>\n
    • _\u8868\u793a\u5355\u4e2a\u5b57\u7b26<\/li>\n
    • []\u8868\u793a\u4e00\u4e2a\u5b57\u7b26\u96c6<\/li>\n<\/ul>\n

      SQL76\u00a0\u68c0\u7d22\u4ea7\u54c1\u540d\u79f0\u548c\u63cf\u8ff0（\u4e8c）<\/h2>\n

      \"\"<\/h2>\n

      \u65b9\u6cd51：\u00a0INSTR\u51fd\u6570\u7528\u6cd5<\/h4>\n

      mysql\u00a0\u8fdb\u884c\u6a21\u7cca\u67e5\u8be2\u65f6，\u53ef\u4f7f\u7528\u5185\u90e8\u51fd\u6570 instr，\u66ff\u4ee3\u4f20\u7edf\u7684 like \u65b9\u5f0f，\u5e76\u4e14\u901f\u5ea6\u66f4\u5feb\u3002<\/p>\n

      instr(field, str) \u51fd\u6570，\u7b2c\u4e00\u4e2a\u53c2\u6570 field \u662f\u5b57\u6bb5，\u7b2c\u4e8c\u4e2a\u53c2\u6570 str \u662f\u8981\u67e5\u8be2\u7684\u4e32，\u8fd4\u56de\u4e32 str \u7684\u4f4d\u7f6e，\u6ca1\u627e\u5230\u5c31\u662f0<\/p>\n

      select prod_name,prod_desc from Products
      \nwhere instr(prod_desc,"toy")=0
      \norder by prod_name; <\/p>\n

      \u65b9\u6cd52：not like<\/span><\/h4>\n

      select prod_name,prod_desc from Products
      \nwhere prod_desc not like '%toy%'
      \norder by prod_name; <\/p>\n

      \u65b9\u6cd53：locate<\/span>(str,sub)<\/h4>\n

      Locate(str,sub) > 0，\u8868\u793asub\u5b57\u7b26\u4e32\u5305\u542bstr\u5b57\u7b26\u4e32；<\/p>\n

      Locate(str,sub) = 0，\u8868\u793asub\u5b57\u7b26\u4e32\u4e0d\u5305\u542bstr\u5b57\u7b26\u4e32\u3002<\/p>\n

      select prod_name,prod_desc from Products
      \nwhere locate("toy",prod_desc)=0
      \norder by prod_name; <\/p>\n

      SQL77\u00a0\u68c0\u7d22\u4ea7\u54c1\u540d\u79f0\u548c\u63cf\u8ff0（\u4e09）<\/h2>\n

      \"\"<\/h2>\n

      select prod_name,prod_desc
      \nfrom Products
      \nwhere prod_desc like "%toy%" and prod_desc like "%carrots%"; <\/p>\n

      LIKE<\/span>\u64cd\u4f5c\u7b26<\/h2>\n

      LIKE<\/span> \u662f SQL \u4e2d\u7528\u4e8e\u6a21\u7cca\u5339\u914d\u5b57\u7b26\u4e32\u7684\u64cd\u4f5c\u7b26，\u5b83\u548c = \u4e0d\u540c：<\/p>\n

        \n
      • = \u8981\u6c42\u5b8c\u5168\u76f8\u7b49（\u7cbe\u786e\u5339\u914d）<\/li>\n
      • LIKE \u5141\u8bb8\u7528\u901a\u914d\u7b26\u6765\u5339\u914d\u7b26\u5408\u67d0\u79cd\u6a21\u5f0f\u7684\u5b57\u7b26\u4e32<\/li>\n<\/ul>\n

        % \u662f LIKE \u4e2d\u5e38\u7528\u7684\u901a\u914d\u7b26<\/h4>\n\n\u6a21\u5f0f\u542b\u4e49\u793a\u4f8b\u5339\u914d<\/tr>\n\n\n\n\n\n
        "toy%"<\/td>\n\u4ee5 toy \u5f00\u5934\u7684\u5b57\u7b26\u4e32<\/td>\ntoy car, toys<\/td>\n<\/tr>\n
        "%toy"<\/td>\n\u4ee5 toy \u7ed3\u5c3e\u7684\u5b57\u7b26\u4e32<\/td>\nstuffed toy, action toy<\/td>\n<\/tr>\n
        "%toy%"<\/td>\n\u5305\u542b toy \u7684\u5b57\u7b26\u4e32（\u4f4d\u7f6e\u4e0d\u9650）<\/td>\nthe toy box, toy story<\/td>\n<\/tr>\n
        "%"<\/td>\n\u5339\u914d\u4efb\u610f\u5b57\u7b26\u4e32（\u76f8\u5f53\u4e8e\u6ca1\u6709\u9650\u5236）<\/td>\n\u6240\u6709\u975e\u7a7a\u5b57\u7b26\u4e32<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

        \u53e6\u4e00\u4e2a\u5e38\u7528\u901a\u914d\u7b26 _<\/h4>\n\n\u6a21\u5f0f\u542b\u4e49\u793a\u4f8b\u5339\u914d<\/tr>\n\n\n\n
        't_y'<\/td>\n\u7b2c 1 \u4f4d\u662f t，\u7b2c 3 \u4f4d\u662f y，\u4e2d\u95f4\u4efb\u610f<\/td>\ntay, tby, tcy<\/td>\n<\/tr>\n
        'to_'<\/td>\n\u4ee5 to \u5f00\u5934，\u540e\u9762\u8ddf 1 \u4e2a\u5b57\u7b26<\/td>\ntoo, top, toy<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

        SQL78\u00a0\u68c0\u7d22\u4ea7\u54c1\u540d\u79f0\u548c\u63cf\u8ff0（\u56db）<\/h2>\n

        \"\"<\/h2>\n

        select prod_name,prod_desc
        \nfrom Products
        \nwhere prod_desc like "%toy%carrots%"; <\/p>\n

        SQL79\u00a0\u522b\u540d<\/h2>\n

        \"\"<\/p>\n

        select vend_id,
        \nvend_name as vname,
        \nvend_address as vaddress,
        \nvend_city as vcity from Vendors
        \norder by vname; <\/p>\n

        AS<\/span>\u53ef\u4ee5\u7701\u7565：<\/h3>\n

        select vend_id,
        \nvend_name vname,
        \nvend_address vaddress,
        \nvend_city vcity
        \nfrom Vendors
        \norder by vname; <\/p>\n

        \u6613\u9519\u70b9<\/span>：vcity \u5728\u6700\u540e\u8fb9，\u4f4d\u7f6e\u4e5f\u4f1a\u5bfc\u81f4\u9519\u8bef<\/p>\n

        SQL80\u00a0\u6253\u6298<\/h2>\n

        \"\"<\/p>\n

        select prod_id,
        \nprod_price,
        \nprod_price*0.9 sale_price
        \nfrom Products;<\/p>\n

        \u4e0eSQL79\u522b\u540d\u77e5\u8bc6\u70b9\u76f8\u4f3c<\/p>\n

        SQL81 \u987e\u5ba2\u767b\u5f55\u540d<\/h2>\n

        \"\"<\/p>\n

        select cust_id,
        \ncust_name,
        \nupper(concat(substring(cust_contact,1,2),substring(cust_city,1,3))) user_login
        \nfrom Customers; <\/p>\n

        \u5173\u952e\u8bcd：substing,concat,upper<\/h4>\n
          \n
        • \u5b57\u7b26\u4e32\u7684\u622a\u53d6：substring<\/span>(\u5b57\u7b26\u4e32，\u8d77\u59cb\u4f4d\u7f6e，\u622a\u53d6\u5b57\u7b26\u6570）<\/li>\n
        • \u5b57\u7b26\u4e32\u7684\u62fc\u63a5：concat<\/span>(\u5b57\u7b26\u4e321，\u5b57\u7b26\u4e322，\u5b57\u7b26\u4e323,…)<\/li>\n
        • \u5b57\u6bcd\u5927\u5199：upper<\/span>(\u5b57\u7b26\u4e32)\u00a0 \u00a0\u8865\u5145:lower<\/span>(\u5b57\u7b26\u4e32)\u5c0f\u5199<\/li>\n<\/ul>\n<\/p>\n<\/p>\n<\/p>\n<\/p>\n<\/p>\n<\/p>\n<\/p>\n<\/p>\n<\/p><\/p>\n","protected":false},"excerpt":{"rendered":"

          SQL72\u00a0\u68c0\u7d22\u5e76\u5217\u51fa\u5df2\u8ba2\u8d2d\u4ea7\u54c1\u7684\u6e05\u5355 # \u65b9\u6cd5\u4e00：
          \nselect order_num,prod_id,quantity
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          \nwhere (prod_id BR01 or prod_id BR02 or prod_id BR03)
          \nand quantity >100;# \u65b9\u6cd5\u4e8c：
          \nselect order_num,prod_id,quantity
          \nfrom OrderItems
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