×ðÁú¿­Ê±

sqlÖв»¼´ÊÇÔõôÌåÏÖ

sql ÖпÉÒÔʹÓá°¡±»ò¡°!=¡±·ûºÅÌåÏÖ²»¼´ÊÇ¡£ÕâÁ½ÖÖ·ûºÅÓÃÓÚ¼ì²é×Ö¶ÎÊÇ·ñ²»¼´ÊÇÖ¸¶¨µÄ¡°Öµ¡±¡£

SQL ÖÐÌåÏÖ²»¼´ÊÇ

ÔÚ SQL ÖУ¬²»¼´ÊÇ¿ÉÒÔʹÓá°¡±»ò¡°!=¡±·ûºÅÌåÏÖ¡£

ʹÓÃ

SELECT * FROM table_name WHERE column_name  value;

µÇ¼ºó¸´ÖÆ

ʹÓà !=

SELECT * FROM table_name WHERE column_name != value;

µÇ¼ºó¸´ÖÆ

ÕâÁ½ÖÖ·ûºÅ¶¼¿ÉÒÔÓÃÀ´¼ì²é×Ö¶ÎÊÇ·ñ²»¼´ÊÇÖ¸¶¨µÄ¡°Öµ¡±¡£

ʾÀý

ÔÚÒÔÏÂʾÀýÖУ¬ÎÒÃÇʹÓá°¡±·ûºÅÅÌÎÊ¡°customers¡±±íÖС°age¡±×ֶβ»¼´ÊÇ 30 µÄËùÓмͼ£º

SELECT * FROM customers WHERE age  30;

µÇ¼ºó¸´ÖÆ

ÈôÊÇ¡°customers¡±±íÓÐÈçÏÂÊý¾Ý£º

id name age
1 John 30
2 Mary 25
3 Bob 35
4 Alice 28

ÄÇôÉÏÃæµÄÅÌÎʽ«·µ»ØÒÔÏÂЧ¹û£º

id name age
2 Mary 25
4 Alice 28

ÒÔÉϾÍÊÇsqlÖв»¼´ÊÇÔõôÌåÏÖµÄÏêϸÄÚÈÝ£¬¸ü¶àÇë¹Ø×¢±¾ÍøÄÚÆäËüÏà¹ØÎÄÕ£¡

ÃâÔð˵Ã÷£ºÒÔÉÏչʾÄÚÈÝȪԴÓÚÏàÖúýÌå¡¢ÆóÒµ»ú¹¹¡¢ÍøÓÑÌṩ»òÍøÂçÍøÂçÕûÀí£¬°æȨÕùÒéÓë±¾Õ¾Î޹أ¬ÎÄÕÂÉæ¼°¿´·¨Óë¿´·¨²»´ú±í×ðÁú¿­Ê±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×ðÁú¿­Ê±ÊµÊ±ÐÞÕý»òɾ³ý¡£

Ïà¹ØÐÂÎÅ

ÁªÏµ×ðÁú¿­Ê±

18523999891

¿É΢ÐÅÔÚÏß×Éѯ

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

QR code
¡¾ÍøÕ¾µØͼ¡¿¡¾sitemap¡¿