{"id":317514,"date":"2024-01-18T22:46:53","date_gmt":"2024-01-18T14:46:53","guid":{"rendered":"https:\/\/www.idc.net\/help\/317514\/"},"modified":"2024-01-18T22:46:53","modified_gmt":"2024-01-18T14:46:53","slug":"sql-server%e7%bb%84%e5%90%88%e6%9f%a5%e8%af%a2sql%e5%b8%b8%e7%94%a8%e5%87%bd%e6%95%b0%e6%9c%89%e5%93%aa%e4%ba%9b%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/idc.net\/help\/317514\/","title":{"rendered":"SQL server\u7ec4\u5408\u67e5\u8be2+sql\u5e38\u7528\u51fd\u6570\u6709\u54ea\u4e9b\uff1f"},"content":{"rendered":"

\u6587\u7ae0\u4e3b\u8981\u63cf\u8ff0\u7684\u662fSQL server\u7ec4\u5408\u67e5\u8be2+sql\u5e38\u7528\u51fd\u6570\uff0c\u5176\u4e2d\u5305\u62ec\u5b57\u7b26\u4e32\u51fd\u6570\uff0c\u6570\u5b66\u51fd\u6570\u4ee5\u53ca\u65e5\u671f\u51fd\u6570\u4e0e\u7cfb\u7edf\u51fd\u6570\u8fd9\u4e9b\u51fd\u6570\u7684\u63cf\u8ff0\uff0c\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u8fd9\u4e9b\u51fd\u6570\u662f\u7ecf\u5e38\u88ab\u7528\u5230\u7684\uff0c\u5982\u4e0b\u60c5\u51b5\u6b64\u95ee\u9898\u5206\u89e3\u51fa\u6765\u662f\u8fd9\u6837\u7684\uff1a<\/p>\n

 <\/p>\n

\u67092\u4e2a\u8868\uff0cA\u548cB\u5b83\u4eec\u901a\u8fc7\u4e00\u4e2aid\u5173\u8054\uff0c\u90fd\u6709\u4e00\u4e2a\u65f6\u95f4\u5217\u3002\u8981\u6c42\u5217\u51faB\u8868\u65f6\u95f4\u5217\u5927\u4e8eA\u8868\u65f6\u95f4\u52175\u5929\u7684\u6570\u636e\uff0c\u5e76\u4e14\u8981\u6c42A\u8868\u7684id\u5217\u7684\u7b2c9\u4f4d\u4e0d\u7b49\u4e8e7\uff0c\u60f3\u4e86\u5f88\u4e45\u6ca1\u6709\u89e3\u51b3\uff0c\u540e\u6765\u8bf7\u6559\u540c\u4e8b\u624d\u505a\u597d\uff1a<\/p>\n

 <\/p>\n

 <\/p>\n

\n \n \n 
    \n  \n  \n  
  1. select B.id from B join A on <\/span>A.id<\/span>=<\/span>B<\/span>.id where substring(B.id,9,1)!='7' and dateadd(dy,5,A.time)<\/span><<\/span>B.time<\/span>  <\/span><\/span><\/li>\n \n \n <\/ol><\/pre>\n
     <\/p>\n
    \u8fd9\u4e9b\u90fd\u7528\u5230sql\u7684\u5e38\u7528\u51fd\u6570\uff0c\u4e0b\u9762\u5217\u51fa\u5e38\u7528\u7684\u51fd\u6570\u4ee5\u65b9\u4fbf\u5927\u5bb6\uff1a<\/p>\n
     <\/p>\n
    SQL server\u7ec4\u5408\u67e5\u8be2+sql\u5e38\u7528\u51fd\u6570\u4e4b1.\u5b57\u7b26\u4e32\u51fd\u6570 <\/strong><\/p>\n
    \u957f\u5ea6\u4e0e\u5206\u6790\u7528<\/p>\n
     <\/p>\n
    datalength(Char_expr) \u8fd4\u56de\u5b57\u7b26\u4e32\u5305\u542b\u5b57\u7b26\u6570,\u4f46\u4e0d\u5305\u542b\u540e\u9762\u7684\u7a7a\u683c<\/p>\n
     <\/p>\n
    substring(expression,start,length) \u4e0d\u591a\u8bf4\u4e86,\u53d6\u5b50\u4e32<\/p>\n
     <\/p>\n
    right(char_expr,int_expr) \u8fd4\u56de\u5b57\u7b26\u4e32\u53f3\u8fb9int_expr\u4e2a\u5b57\u7b26<\/p>\n
     <\/p>\n
    \u5b57\u7b26\u64cd\u4f5c\u7c7b<\/p>\n
     <\/p>\n
    upper(char_expr) \u8f6c\u4e3a\u5927\u5199<\/p>\n
     <\/p>\n
    lower(char_expr) \u8f6c\u4e3a\u5c0f\u5199<\/p>\n
     <\/p>\n
    space(int_expr) \u751f\u6210int_expr\u4e2a\u7a7a\u683c<\/p>\n
     <\/p>\n
    replicate(char_expr,int_expr)\u590d\u5236\u5b57\u7b26\u4e32int_expr\u6b21<\/p>\n
     <\/p>\n
    reverse(char_expr) \u53cd\u8f6c\u5b57\u7b26\u4e32<\/p>\n
     <\/p>\n
    stuff(char_expr1,start,length,char_expr2) \u5c06\u5b57\u7b26\u4e32char_expr1\u4e2d\u7684\u4ece<\/p>\n
     <\/p>\n
    start\u5f00\u59cb\u7684length\u4e2a\u5b57\u7b26\u7528char_expr2\u4ee3\u66ff<\/p>\n
     <\/p>\n
    ltrim(char_expr) rtrim(char_expr) \u53d6\u6389\u7a7a\u683c<\/p>\n
     <\/p>\n
    ascii(char) char(ascii) \u4e24\u51fd\u6570\u5bf9\u5e94,\u53d6ascii\u7801,\u6839\u636eascii\u5417\u53d6\u5b57\u7b26<\/p>\n
    \u5b57\u7b26\u4e32\u67e5\u627e<\/p>\n
    charindex(char_expr,expression) \u8fd4\u56dechar_expr\u7684\u8d77\u59cb\u4f4d\u7f6e<\/p>\n
     <\/p>\n
    patindex(\"%pattern%\",expression) \u8fd4\u56de\u6307\u5b9a\u6a21\u5f0f\u7684\u8d77\u59cb\u4f4d\u7f6e,\u5426\u5219\u4e3a0<\/p>\n
     <\/p>\n
    SQL server\u7ec4\u5408\u67e5\u8be2+sql\u5e38\u7528\u51fd\u6570\u4e4b2.\u6570\u5b66\u51fd\u6570 <\/strong><\/p>\n
    abs(numeric_expr) \u6c42\u7edd\u5bf9\u503c<\/p>\n
     <\/p>\n
    ceiling(numeric_expr) \u53d6\u5927\u4e8e\u7b49\u4e8e\u6307\u5b9a\u503c\u7684\u6700\u5c0f\u6574\u6570<\/p>\n
     <\/p>\n
    exp(float_expr) \u53d6\u6307\u6570<\/p>\n
     <\/p>\n
    floor(numeric_expr) \u5c0f\u4e8e\u7b49\u4e8e\u6307\u5b9a\u503c\u5f97***\u6574\u6570<\/p>\n
     <\/p>\n
    pi() 3.1415926.........<\/p>\n
     <\/p>\n
    power(numeric_expr,power) \u8fd4\u56depower\u6b21\u65b9<\/p>\n
     <\/p>\n
    rand([int_expr]) \u968f\u673a\u6570\u4ea7\u751f\u5668<\/p>\n
     <\/p>\n
    round(numeric_expr,int_expr) \u5b89int_expr\u89c4\u5b9a\u7684\u7cbe\u5ea6\u56db\u820d\u4e94\u5165<\/p>\n
     <\/p>\n
    sign(int_expr) \u6839\u636e\u6b63\u6570,0,\u8d1f\u6570,,\u8fd4\u56de+1,0,-1<\/p>\n
     <\/p>\n
    sqrt(float_expr) \u5e73\u65b9\u6839<\/p>\n
     <\/p>\n
    SQL server\u7ec4\u5408\u67e5\u8be2+sql\u5e38\u7528\u51fd\u6570\u4e4b3.\u65e5\u671f\u51fd\u6570 <\/strong><\/p>\n
    getdate() \u8fd4\u56de\u65e5\u671f<\/p>\n
     <\/p>\n
    datename(datepart,date_expr) \u8fd4\u56de\u540d\u79f0\u5982 June<\/p>\n
     <\/p>\n
    datepart(datepart,date_expr) \u53d6\u65e5\u671f\u4e00\u90e8\u4efd<\/p>\n
     <\/p>\n
    datediff(datepart,date_expr1.dateexpr2) \u65e5\u671f\u5dee<\/p>\n
     <\/p>\n
    dateadd(datepart,number,date_expr) \u8fd4\u56de\u65e5\u671f\u52a0\u4e0a number<\/p>\n
     <\/p>\n
    \u4e0a\u8ff0\u51fd\u6570\u4e2ddatepart\u7684<\/p>\n
     <\/p>\n
    \u5199\u6cd5 \u53d6\u503c\u548c\u610f\u4e49<\/p>\n
     <\/p>\n
    yy 1753-9999 \u5e74\u4efd<\/p>\n
     <\/p>\n
    qq 1-4 \u523b<\/p>\n
     <\/p>\n
    mm 1-12 \u6708<\/p>\n
     <\/p>\n
    dy 1-366 \u65e5<\/p>\n
     <\/p>\n
    dd 1-31 \u65e5<\/p>\n
     <\/p>\n
    wk 1-54 \u5468<\/p>\n
     <\/p>\n
    dw 1-7 \u5468\u51e0<\/p>\n
     <\/p>\n
    hh 0-23 \u5c0f\u65f6<\/p>\n
     <\/p>\n
    mi 0-59 \u5206\u949f<\/p>\n
     <\/p>\n
    ss 0-59 \u79d2<\/p>\n
     <\/p>\n
    ms 0-999 \u6beb\u79d2<\/p>\n
     <\/p>\n
    \u65e5\u671f\u8f6c\u6362<\/p>\n
    convert()<\/p>\n
     <\/p>\n
    SQL server\u7ec4\u5408\u67e5\u8be2+sql\u5e38\u7528\u51fd\u6570\u4e4b4.\u7cfb\u7edf\u51fd\u6570 <\/strong><\/p>\n
     <\/p>\n
    suser_name() \u7528\u6237\u767b\u5f55\u540d<\/p>\n
     <\/p>\n
    user_name() \u7528\u6237\u5728\u6570\u636e\u5e93\u4e2d\u7684\u540d\u5b57<\/p>\n
     <\/p>\n
    user \u7528\u6237\u5728\u6570\u636e\u5e93\u4e2d\u7684\u540d\u5b57<\/p>\n
     <\/p>\n
    show_role() \u5bf9\u5f53\u524d\u7528\u6237\u8d77\u4f5c\u7528\u7684\u89c4\u5219<\/p>\n
     <\/p>\n
    db_name() \u6570\u636e\u5e93\u540d<\/p>\n
     <\/p>\n
    object_name(obj_id) \u6570\u636e\u5e93\u5bf9\u8c61\u540d<\/p>\n
     <\/p>\n
    col_name(obj_id,col_id) \u5217\u540d<\/p>\n
     <\/p>\n
    col_length(objname,colname) \u5217\u957f\u5ea6<\/p>\n
     <\/p>\n
    valid_name(char_expr) \u662f\u5426\u662f\u6709\u6548\u6807\u8bc6\u7b26<\/p>\n
    \u4ee5\u4e0a\u7684\u76f8\u5173\u5185\u5bb9\u5c31\u662f\u5bf9SQL server\u7ec4\u5408\u67e5\u8be2+sql\u5e38\u7528\u51fd\u6570\u7684\u4ecb\u7ecd\uff0c\u671b\u4f60\u80fd\u6709\u6240\u6536\u83b7\u3002<\/p>\n
    \u3010\u7f16\u8f91\u63a8\u8350\u3011<\/p>\n
      \n
    1. SQL Server\u62c6\u5206\u5b57\u7b26\u4e32\u76843\u5e38\u7528\u79cd\u65b9\u6cd5<\/li>\n
    2. SQL Server2005\u63d2\u5165\u6c49\u5b57\u53d8\u95ee\u53f7\u7684\u7834\u89e3<\/li>\n
    3. SQL Server \u6e38\u6807\u7684\u7b80\u5355\u7684\u793a\u4f8b\u63cf\u8ff0<\/li>\n
    4. SQL Server \u8868\u5185\u5bb9\u7684\u7ec4\u5408\u7684\u64cd\u4f5c\u6a21\u5f0f<\/li>\n
    5. SQL Server 2005\u62a5\u544a\u670d\u52a1\u67b6\u6784\u7684\u6b63\u786e\u5256\u6790<\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"
      \u6587\u7ae0\u4e3b\u8981\u63cf\u8ff0\u7684\u662fSQL server\u7ec4\u5408\u67e5\u8be2+sql\u5e38\u7528\u51fd\u6570\uff0c\u5176\u4e2d\u5305\u62ec\u5b57\u7b26\u4e32\u51fd\u6570\uff0c\u6570\u5b66\u51fd\u6570\u4ee5\u53ca\u65e5\u671f\u51fd\u6570\u4e0e\u7cfb\u7edf\u51fd […]<\/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-317514","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts\/317514","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=317514"}],"version-history":[{"count":0,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts\/317514\/revisions"}],"wp:attachment":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/media?parent=317514"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/categories?post=317514"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/tags?post=317514"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}