sqlÖв»¼´ÊÇ0Ôõôд
ÔÚ sql ÖУ¬ÅжÏÒ»¸öÖµÊÇ·ñ²»¼´ÊÇ 0£¬¿ÉÒÔʹÓò»µÈºÅÔËËã·û !=£¬Ó﷨Ϊ£ºexpression != 0¡£ÀýÈ磬²éÕÒËùÓв»¼´ÊÇ 0 µÄ¼Í¼ʱ£¬¿ÉÒÔʹÓà select * from table_name where column_name != 0;
SQL ÖÐÅжϲ»¼´ÊÇ 0
ÔÚ SQL ÖУ¬ÅжÏÒ»¸öÖµÊÇ·ñ²»¼´ÊÇ 0£¬¿ÉÒÔʹÓò»µÈºÅÔËËã·û (!=)¡£ËüµÄÓï·¨ÈçÏ£º
expression != 0
µÇ¼ºó¸´ÖÆ
ÆäÖУ¬expression ÌåÏÖÒª½ÏÁ¿µÄÖµ¡£
ÀýÈ磬Ҫ²éÕÒ²»¼´ÊÇ 0 µÄËùÓмͼ£¬¿ÉÒÔʹÓÃÒÔÏÂÅÌÎÊ£º
SELECT * FROM table_name WHERE column_name != 0;
µÇ¼ºó¸´ÖÆ
ÆäËû×¢ÖØÊÂÏ
ÔÚijЩ SQL Êý¾Ý¿â£¨Èç MySQL£©ÖУ¬²»¼´ÊÇÔËËã·ûÒ²¿ÉÒÔд³É ¡£
!= ÔËËã·ûµÄÓÅÏȼ¶¸ßÓÚ = ÔËËã·û¡£Òò´Ë£¬ÔÚ±í´ïʽÖÐʹÓà != ʱ£¬ÎÞÐèʹÓÃÀ¨ºÅ¡£
ÈôÊÇÒª²éÕÒ¼´ÊÇ»ò²»¼´ÊÇ 0 µÄ¼Í¼£¬¿ÉÒÔʹÓà OR ÔËËã·û¡£ÀýÈ磺
SELECT * FROM table_name WHERE column_name = 0 OR column_name != 0;
µÇ¼ºó¸´ÖÆ
ÒÔÉϾÍÊÇsqlÖв»¼´ÊÇ0ÔõôдµÄÏêϸÄÚÈÝ£¬¸ü¶àÇë¹Ø×¢±¾ÍøÄÚÆäËüÏà¹ØÎÄÕ£¡
ÃâÔð˵Ã÷£ºÒÔÉÏչʾÄÚÈÝȪԴÓÚÏàÖúýÌå¡¢ÆóÒµ»ú¹¹¡¢ÍøÓÑÌṩ»òÍøÂçÍøÂçÕûÀí£¬°æȨÕùÒéÓë±¾Õ¾Î޹أ¬ÎÄÕÂÉæ¼°¿´·¨Óë¿´·¨²»´ú±í尊龙凯时人生就是博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尊龙凯时人生就是博ʵʱÐÞÕý»òɾ³ý¡£