尊龙凯时人生就是搏

sqlÖÐanyÊÇʲôÒâ˼

sqlÖеÄanyÒªº¦´ÊÓÃÓÚ¼ì²é×ÓÅÌÎÊÊÇ·ñ·µ»ØÈκÎÖª×ã¸ø¶¨Ìõ¼þµÄÐУºÓï·¨£ºany (subquery)Ó÷¨£ºÓë½ÏÁ¿ÔËËã·ûÒ»ÆðʹÓã¬ÈôÊÇ×ÓÅÌÎÊ·µ»ØÈκÎÖª×ãÌõ¼þµÄÐУ¬Ôòany±í´ïʽÆÀ¹ÀΪtrueÓŵ㣺¼ò»¯ÅÌÎÊ£¬Ìá¸ßЧÂÊ£¬ÊÊÓÃÓÚ´¦Àí´ó×ÚÊý¾Ý¾ÖÏÞÐÔ£º²»Ìṩ֪×ãÌõ¼þµÄÌض¨ÐУ¬ÈôÊÇ×ÓÅÌÎÊ·µ»Ø¶à¸öÖª×ãÌõ¼þµÄÐУ¬ÔòÖ»·µ»Øtrue

SQLÖеÄANY

ANYÔÚSQLÖÐÊÇÒ»¸öÒªº¦×Ö£¬ÓÃÓÚ¼ì²é×ÓÅÌÎÊ·µ»ØµÄÈκÎÒ»ÐÐÊÇ·ñÖª×ã¸ø¶¨Ìõ¼þ¡£ËüÓÃÓÚÈ·¶¨ÊÇ·ñ±£´æÖª×ãÌõ¼þµÄÐУ¬¶ø²»ÊÇ»ñÈ¡Öª×ãÌõ¼þµÄÌض¨ÐС£

Óï·¨£º

ANY (subquery)

µÇ¼ºó¸´ÖÆ

Ó÷¨£º

ANYͨ³£Óë½ÏÁ¿ÔËËã·û£¨Èç=¡¢>¡¢

ʾÀý£º

SELECT * 
FROM customers
WHERE ANY (SELECT order_id FROM orders WHERE customer_id = customers.customer_id) > 100;

µÇ¼ºó¸´ÖÆ

¸ÃÅÌÎʽ«»ñÈ¡¿Í»§IDÓëÈκζ©µ¥ID´óÓÚ100µÄ¿Í»§¡£

Óŵ㣺

ANY¿ÉÒÔ¼ò»¯ÅÌÎÊ£¬×èֹʹÓÃǶÌ×ÅÌÎÊ¡£

Ëü¿ÉÒÔÌá¸ßÅÌÎÊЧÂÊ£¬ÓÉÓÚSQLÓÅ»¯Æ÷¿ÉÒÔÌø¹ý²»Öª×ãÌõ¼þµÄÐС£

Ëü¿ÉÒÔÓÃÓÚ´¦Àí°üÀ¨´ó×ÚÊý¾ÝµÄ±í¡£

¾ÖÏÞÐÔ£º

ANY²»Ìṩ֪×ãÌõ¼þµÄÌض¨ÐС£

ÈôÊÇ×ÓÅÌÎÊ·µ»Ø¶à¸öÖª×ãÌõ¼þµÄÐУ¬ÔòANY±í´ïʽֻ·µ»Øtrue¡£

ÆäËû×¢ÖØÊÂÏ

ANY¿ÉÒÔÓëALLÒªº¦×ÖÒ»ÆðʹÓã¬ÒÔ¼ì²éËùÓÐÐÐÊÇ·ñÖª×ãÌõ¼þ¡£

ANY¹ØÓÚ¼ì²éÊÇ·ñ±£´æÊý¾ÝºÜÊÇÓÐÓ㬶ø²»ÊǼìË÷Ìض¨Ãü¾Ý¡£

ÔÚijЩÇéÐÎÏ£¬Ê¹ÓÃEXISTSÒªº¦×Ö¿ÉÒÔ»ñµÃÀàËƵÄЧ¹û£¬µ«¿ÉÄÜЧÂʽϵÍ¡£

ÒÔÉϾÍÊÇsqlÖÐanyÊÇʲôÒâ˼µÄÏêϸÄÚÈÝ£¬¸ü¶àÇë¹Ø×¢±¾ÍøÄÚÆäËüÏà¹ØÎÄÕ£¡

ÃâÔð˵Ã÷£ºÒÔÉÏչʾÄÚÈÝȪԴÓÚÏàÖúýÌå¡¢ÆóÒµ»ú¹¹¡¢ÍøÓÑÌṩ»òÍøÂçÍøÂçÕûÀí£¬°æȨÕùÒéÓë±¾Õ¾Î޹أ¬ÎÄÕÂÉæ¼°¿´·¨Óë¿´·¨²»´ú±í尊龙凯时人生就是搏ÂËÓÍ»úÍø¹Ù·½Ì¬¶È£¬Çë¶ÁÕß½ö×ö²Î¿¼¡£±¾ÎĽӴýתÔØ£¬×ªÔØÇë˵Ã÷À´ÓÉ¡£ÈôÄúÒÔΪ±¾ÎÄÇÖÕ¼ÁËÄúµÄ°æȨÐÅÏ¢£¬»òÄú·¢Ã÷¸ÃÄÚÈÝÓÐÈκÎÉæ¼°ÓÐÎ¥¹«µÂ¡¢Ã°·¸Ö´·¨µÈÎ¥·¨ÐÅÏ¢£¬ÇëÄúÁ¬Ã¦ÁªÏµ尊龙凯时人生就是搏ʵʱÐÞÕý»òɾ³ý¡£

Ïà¹ØÐÂÎÅ

ÁªÏµ尊龙凯时人生就是搏

18523999891

¿É΢ÐÅÔÚÏß×Éѯ

ÊÂÇéʱ¼ä£ºÖÜÒ»ÖÁÖÜÎ壬9:30-18:30£¬½ÚãåÈÕÐÝÏ¢

QR code
sitemap¡¢ÍøÕ¾µØͼ