×ðÁú¿­Ê±

sqlÖÐÐ޸ıíÖÐÊý¾ÝµÄÏÂÁîÊÇ

sql ÖÐ×î³£ÓõÄÐ޸ıíÖÐÊý¾ÝµÄÏÂÁîÊÇ update£¬ÓÃÓÚ¸üÐÂÖª×ãÌõ¼þµÄÐеÄÖ¸¶¨ÁеÄÊý¾Ý¡£ÏÂÁîÓï·¨ÈçÏ£ºupdate table_name set column_name = new_value where condition;¡£ÀýÈ磺update customers set address = ‘123 main street’ where name = ‘john’ and age > 30; »á½«±í “customers” ÖÐ “name” ÁÐΪ “john” ÇÒ “age”

SQL ÖÐÐ޸ıíÖÐÊý¾ÝµÄÏÂÁî

SQL ÖÐ×î³£ÓõÄÐ޸ıíÖÐÊý¾ÝµÄÏÂÁîÊÇ£º

UPDATE

Óï·¨£º

UPDATE table_name SET column_name = new_value
WHERE condition;

µÇ¼ºó¸´ÖÆ

×÷Óãº

UPDATE ÏÂÁîÓÃÓÚ¸üÐÂÖ¸¶¨±íÖÐÖª×ãÌõ¼þµÄÐеÄÖ¸¶¨ÁÐÖеÄÊý¾Ý¡£

²ÎÊý£º

table_name£ºÒª¸üеıíÃû¡£

column_name£ºÒª¸üеÄÁÐÃû¡£

new_value£ºÒª¸üÐÂΪµÄÐÂÖµ¡£

condition£º¿ÉÑ¡£¬Ö¸¶¨Òª¸üеÄÐС£ÈôÊDz»Ö¸¶¨Ìõ¼þ£¬Ôò¸üбíÖеÄËùÓÐÐС£

ʾÀý£º

ÒÔÏÂÏÂÁ±í “customers” ÖÐ “name” ÁÐΪ “John” ÇÒ “age” ÁдóÓÚ 30 µÄËùÓÐÐÐµÄ “address” ÁиüÐÂΪ “123 Main Street”£º

UPDATE customers SET address = '123 Main Street'
WHERE name = 'John' AND age > 30;

µÇ¼ºó¸´ÖÆ

ÒÔÉϾÍÊÇsqlÖÐÐ޸ıíÖÐÊý¾ÝµÄÏÂÁîÊǵÄÏêϸÄÚÈÝ£¬¸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¡¿