{"id":311153,"date":"2022-10-16T23:35:24","date_gmt":"2022-10-16T15:35:24","guid":{"rendered":"https:\/\/www.idc.net\/help\/311153\/"},"modified":"2022-10-16T23:35:24","modified_gmt":"2022-10-16T15:35:24","slug":"sql-server%e5%ae%9e%e8%b7%b5%e6%80%a7%e7%bb%83%e4%b9%a0%e4%b9%8b%e9%ab%98%e7%ba%a7sql%e6%9f%a5%e8%af%a2","status":"publish","type":"post","link":"https:\/\/idc.net\/help\/311153\/","title":{"rendered":"SQL Server\u5b9e\u8df5\u6027\u7ec3\u4e60\u4e4b\u9ad8\u7ea7SQL\u67e5\u8be2"},"content":{"rendered":"

\u4e0a\u6b21\u6211\u4eec\u4ecb\u7ecd\u4e86\uff1aSQL Server\u5b9e\u8df5\u6027\u7ec3\u4e60\u4e4b\u5b50\u67e5\u8be2\u5b9e\u4f8b\uff0c\u672c\u6587\u6211\u4eec\u4e3b\u8981\u4ecb\u7ecd\u4e00\u4e9bSQL Server\u5b9e\u8df5\u6027\u7ec3\u4e60\u7684\u4e00\u4e9b\u9ad8\u7ea7SQL\u67e5\u8be2\u7684\u5b9e\u4f8b\uff0c\u63a5\u4e0b\u6765\u5c31\u8ba9\u6211\u4eec\u6765\u4e00\u8d77\u4e86\u89e3\u4e00\u4e0b\u8fd9\u90e8\u5206\u5185\u5bb9\u3002<\/p>\n

--3.6.2 \u68c0\u7d22\u6ca1\u6709\u901a\u8fc7\u4ee3\u7406\u5546a05\u8ba2\u8d27\u7684\u6240\u6709\u987e\u5ba2\u7684\u540d\u5b57<\/p>\n

\n \n \n 
    \n  \n  \n  
  1. select cname from customers except  <\/span><\/span><\/li>\n  \n  \n  
  2. (select cname from customers,orders where <\/span>customers.cid<\/span>=<\/span>orders<\/span>.cid and <\/span>orders.aid<\/span>=<\/span>'a05'<\/span>) <\/span><\/li>\n \n \n <\/ol><\/pre>\n
    --\u8fd9\u65f6except\u662f\u5173\u952e<\/p>\n
    ---3.6.3 \u68c0\u7d22\u5bf9\u540c\u4e00\u4ea7\u54c1\u81f3\u5c11\u8ba2\u8d2d\u4e86\u4e24\u6b21\u7684\u6240\u6709\u987e\u5ba2\u7684\u540d\u5b57<\/p>\n
    \n \n \n 
      \n  \n  \n  
    1. select cname from customers where cid in  <\/span><\/span><\/li>\n  \n  \n  
    2. (select cid from orders group by cid,pid having count(pid)<\/span>><\/span>=2) <\/span><\/li>\n \n \n <\/ol><\/pre>\n
      --\u7b54\u6848:<\/p>\n
      \n \n \n 
        \n  \n  \n  
      1. select distinct cname from (select o.cid as spcid from orders o,orders x where <\/span>o.cid<\/span>=<\/span>x<\/span>.cid  <\/span><\/span><\/li>\n  \n  \n  
      2. and <\/span>o.pid<\/span>=<\/span>x<\/span>.pid and o.ordno<\/span><<\/span>><\/span> x.ordno)y, customers c where <\/span>y.spcid<\/span>=c.cid; <\/span><\/li>\n \n \n <\/ol><\/pre>\n
        --3.6.4 \u68c0\u7d22\u81f3\u5c11\u8ba2\u8d2d\u4e86\u4e00\u4ef6\u4ef7\u683c\u4f4e\u4e8e\uffe50.50 \u7684\u5546\u54c1\u7684\u6240\u6709\u987e\u5ba2\u7684\u59d3\u540d
         --\u7b54\u6848:\u6211\u6ca1\u505a\u51fa\u6765,\u4e0b\u9762\u8fd9\u79cd\u65b9\u6cd5\u8fd0\u884c\u6ca1\u901a\u8fc7
         select distinct cname from (orders join products using(pid)) join customers using(cid) where price<0.50<\/p>\n
        --\u6cd52:\u5c063\u4e2a\u8868\u76f4\u63a5\u8fde\u63a5\u8d77\u6765\u5c31\u53ef\u4ee5\u4e86
         select distinct cname from (orders o join products p on o.pid=p.pid) join customers c on o.cid=c.cid where p.price<0.5<\/p>\n
        --3.7.1 \u6c42\u51fa\u6240\u6709\u8ba2\u8d27\u4ea4\u6613\u7684\u603b\u91d1\u989d
         select sum(dollars) as totaldollars from orders;<\/p>\n
        --3.7.2 \u6c42\u51fa\u4ea7\u54c1p03\u7684\u8ba2\u8d2d\u603b\u91cf
         select pid,count(pid) as \u8ba2\u8d2d\u603b\u91cf from orders where pid='p03' group by pid --\u9519\u8bef\u7684\uff0c\u6ca1\u7406\u89e3\u9898\u610f<\/p>\n
        --\u7b54\u6848\uff1a
         select sum(qty) as total from orders where pid='p03'<\/p>\n
        --3.7.3 \u6c42\u51fa\u987e\u5ba2\u603b\u6570\u7684\u67e5\u8be2
         select count(*) as \u987e\u5ba2\u603b\u6570 from customers<\/p>\n
        --3.7.4 \u6c42\u51fa\u6709\u987e\u5ba2\u5c45\u4f4f\u7684\u57ce\u5e02\u7684\u6570\u76ee
         select count(distinct city) as \u6709\u987e\u5ba2\u5c45\u4f4f\u7684\u57ce\u5e02\u6570\u76ee from customers<\/p>\n
        --3.7.5 \u5217\u51fa\u6298\u6263\u503c\u5c0f\u4e8e***\u6298\u6263\u503c\u7684\u6240\u6709\u987e\u5ba2\u7684cid\u503c <\/p>\n
        \n \n \n 
          \n  \n  \n  
        1. select cid,cname,discnt from customers where discnt<\/span><<\/span> <\/span><\/span><\/li>\n  \n  \n  
        2. (select max(discnt) from customers) <\/span><\/li>\n \n \n <\/ol><\/pre>\n
          --\u5b9e\u9645\u4e0a\u90a3\u6761\u7a7a\u503c\u7684\u8bb0\u5f55\u6ca1\u6709\u9009\u8fdb\u6765<\/p>\n
          --3.7.6 \u627e\u51fa\u81f3\u5c11\u88ab\u4e24\u4e2a\u987e\u5ba2\u8ba2\u8d2d\u7684\u6240\u6709\u4ea7\u54c1\uff08\u53ef\u4ee5\u63a8\u5e7f\u5230\u591a\u4e8e\u4e24\u4e2a\u987e\u5ba2\u7684\u60c5\u51b5\uff09
           select pid from orders group by pid having count(cid)>=2
           --\u6211\u7684\u601d\u8def\u662f select pid from orders 
           --select pid,count(cid) as \u4ea7\u54c1\u88ab\u51e0\u4e2a\u987e\u5ba2\u8ba2\u8d2d from orders group by pid having count(cid)>=2<\/p>\n
          --\u7b54\u6848\u5982\u4e0b\uff1a
           select p.pid from products p where 2<=(select count(distinct cid) from orders where pid=p.pid)<\/p>\n
          --3.7.7 
           insert into customers (cid,cname,city)
           values ('c009','Windix','Dallas');<\/p>\n
          select * from customers where discnt<=10 or discnt>10
           --\u663e\u7136,\u6ca1\u6709\u67e5\u51fa\u6240\u6709\u8bb0\u5f55<\/p>\n
          --\u4f7f\u7528\u7279\u6b8a\u8c13\u8bcdis null
           select * from customers where discnt is null or discnt<=10 or discnt>10<\/p>\n
          --3.8 SQL\u4e2d\u884c\u7684\u5206\u7ec4
           --3.8.1 \u521b\u5efa\u4e00\u4e2a\u8ba1\u7b97\u6bcf\u6837\u4ea7\u54c1\u88ab\u6bcf\u4e2a\u4ee3\u7406\u5546\u8ba2\u8d2d\u7684\u603b\u91cf\u7684\u67e5\u8be2
           select aid,pid,sum(qty) as \u6bcf\u4e2a\u4ee3\u7406\u5546\u8ba2\u8d2d\u7684\u603b\u91cf from orders group by aid,pid<\/p>\n
          3\u3001\u6267\u884c\u6548\u7387\u7684\u5206\u6790<\/p>\n
          --\u98984\uff1a\u627e\u51fa\u8ba2\u8d2d\u4e86\u4ea7\u54c1p05\u7684\u987e\u5ba2\u7684\u540d\u5b57
           select cname from customers where cid in (select cid from orders where pid='p05')<\/p>\n
          --\u7b54\u6848\u7528\u6700\u76f4\u63a5\u7684SQL\u8bed\u53e5\u6765\u89e3\u51b3\u8be5\u67e5\u8be2\u95ee\u9898
           select distinct cname from customers,orders where customers.cid = orders.cid and orders.pid='p05';
           --\u7528\u8fde\u63a5\u4e5f\u80fd\u8fbe\u5230\u76f8\u540c\u7684\u6548\u679c\uff0c\u91cd\u8981\u7684\u662f\u62c6\u89e3\u9898\u76ee\u7684\u610f\u601d
           select distinct cname from customers inner join orders on customers.cid = orders.cid and orders.pid='p05';<\/p>\n
          --\u90a3\u4e48\u6211\u4eec\u6765\u770b\u4e00\u4e0b\u4e09\u79cd\u60c5\u51b5\u7684\u6267\u884c\u6548\u7387<\/p>\n
          \n \n \n 
            \n  \n  \n  
          1. SET ANSI_NULLS ON  <\/span><\/span><\/li>\n  \n  \n  
          2. GO  <\/span><\/li>\n  \n  \n  
          3. SET QUOTED_IDENTIFIER ON  <\/span><\/li>\n  \n  \n  
          4. GO  <\/span><\/li>\n  \n  \n  
          5. --<\/span> =============================================  <\/span><\/li>\n  \n  \n  
          6. -- Author:<\/span><<\/span>Author<\/span>,,Name<\/span>><\/span> <\/span><\/li>\n  \n  \n  
          7. -- Create date: <\/span><<\/span>Create<\/span> Date,,<\/span>><\/span> <\/span><\/li>\n  \n  \n  
          8. -- Description:<\/span><<\/span>Description<\/span>,,<\/span>><\/span> <\/span><\/li>\n  \n  \n  
          9. --<\/span> =============================================  <\/span><\/li>\n  \n  \n  
          10. alter PROCEDURE a  <\/span><\/li>\n  \n  \n  
          11. @pid varchar(10)  <\/span><\/li>\n  \n  \n  
          12. AS  <\/span><\/li>\n  \n  \n  
          13. BEGIN  <\/span><\/li>\n  \n  \n  
          14. --select cname from customers where cid in (select cid from orders where <\/span>pid<\/span>=@pid) 16ms  <\/span><\/li>\n  \n  \n  
          15. --select distinct cname from customers,orders where <\/span>customers.cid<\/span> = <\/span>orders<\/span>.cid and <\/span>orders.pid<\/span>=@pid; 3ms  <\/span><\/li>\n  \n  \n  
          16. --select distinct cname from customers inner join orders on <\/span>customers.cid<\/span> = <\/span>orders<\/span>.cid and <\/span>orders.pid<\/span>=@pid; 3ms  <\/span><\/li>\n  \n  \n  
          17. END  <\/span><\/li>\n  \n  \n  
          18. GO  <\/span><\/li>\n  \n  \n  
          19. DBCC FREEPROCCACHE --\u6e05\u9664\u7f13\u5b58\uff0c\u4ee5\u514d\u4e0b\u6b21\u8ba1\u7b97\u65f6\u95f4  <\/span><\/li>\n  \n  \n  
          20. declare @begin datetime  <\/span><\/li>\n  \n  \n  
          21. declare @End datetime  <\/span><\/li>\n  \n  \n  
          22. set @<\/span>begin<\/span>=<\/span>getdate<\/span>()  <\/span><\/li>\n  \n  \n  
          23. exec a 'p05'  <\/span><\/li>\n  \n  \n  
          24. set @<\/span>End<\/span>=<\/span>getdate<\/span>()  <\/span><\/li>\n  \n  \n  
          25. select datediff(ms,@begin,@End) as \u6267\u884c\u65f6\u95f4(\u6beb\u79d2) <\/span><\/li>\n \n \n <\/ol><\/pre>\n
            --\u7531\u6b64\u53ef\u89c1\uff0c\u4e00\u822c\u60c5\u51b5\u4e0b\u8fd9\u79cd\u9898\u76ee\u80fd\u76f4\u63a5\u5199\u7684\u5c31\u76f4\u63a5\u7528\u8fde\u63a5\u7684\u65b9\u6cd5\uff0c\u7528in\u7684\u6548\u7387\u6781\u4f4e\u3002<\/p>\n
            \u5173\u4e8eSQL Server\u6570\u636e\u5e93\u5b9e\u8df5\u6027\u7ec3\u4e60\u4e4b\u9ad8\u7ea7SQL\u67e5\u8be2\u7684\u5b9e\u4f8b\u4ecb\u7ecd\u5c31\u5230\u8fd9\u91cc\u4e86\uff0c\u5e0c\u671b\u672c\u6b21\u7684\u4ecb\u7ecd\u80fd\u591f\u5bf9\u60a8\u6709\u6240\u5e2e\u52a9\u3002<\/p>\n
            SQL Server\u6570\u636e\u5e93\u5b9e\u8df5\u6027\u7ec3\u4e60\u7684\u76f8\u5173\u6587\u7ae0\uff1a<\/p>\n
            SQL Server\u5b9e\u8df5\u6027\u7ec3\u4e60\u4e4b\u5b50\u67e5\u8be2\u5b9e\u4f8b<\/p>\n
            SQL Server\u5b9e\u8df5\u6027\u7ec3\u4e60\u4e4b\u521b\u5efa\u5e93\u8868\u53ca\u6761\u4ef6\u67e5\u8be2<\/p>\n
            \u3010\u7f16\u8f91\u63a8\u8350\u3011<\/p>\n
              \n
            1. SQL Server 2008\u6570\u636e\u5e93\u5b66\u4e60\u7b14\u8bb0<\/font><\/li>\n
            2. SQL Server 2005\u6570\u636e\u5e93nolock\u4f7f\u7528\u8be6\u89e3<\/font><\/li>\n
            3. SQL Server\u5982\u4f55\u542f\u7528Ad Hoc Distributed Queries\uff1f<\/font><\/li>\n
            4. SQL Server 2008\u7528\u5b58\u50a8\u8fc7\u7a0b\u5b9e\u73b0\u63d2\u5165\u66f4\u65b0\u6570\u636e\u7684\u5b9e\u4f8b<\/font><\/li>\n
            5. \u542b\u6709GROUP BY\u5b50\u53e5\u7684\u67e5\u8be2\u4e2d\u5982\u4f55\u663e\u793aCOUNT()\u4e3a0\u7684\u7ed3\u679c<\/font><\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"
              \u4e0a\u6b21\u6211\u4eec\u4ecb\u7ecd\u4e86\uff1aSQL Server\u5b9e\u8df5\u6027\u7ec3\u4e60\u4e4b\u5b50\u67e5\u8be2\u5b9e\u4f8b\uff0c\u672c\u6587\u6211\u4eec\u4e3b\u8981\u4ecb\u7ecd\u4e00\u4e9bSQL Server\u5b9e\u8df5\u6027\u7ec3\u4e60 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7038],"tags":[],"class_list":["post-311153","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts\/311153","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/comments?post=311153"}],"version-history":[{"count":0,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts\/311153\/revisions"}],"wp:attachment":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/media?parent=311153"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/categories?post=311153"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/tags?post=311153"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}