mssqlÊý¾Ýµ¸Èëmysql
´ÓÍøÉÏ¿´Á˺ܲ»ÉÙÕâ·½ÃæµÄ˵·¨£¬¶ÔÎÒÀ´ËµÓô¦²»ÊǺܴó¡£ÏÖÔÚ½«Ò»¸ösql serverµÄÊý¾Ý¿âÀïµÄÊý¾Ýµ¼Èëµ½mysqlÖУ¬ÀïÃæµÄ×Ö¶ÎÓÐËù¸Ä¶¯µÄ¡£×Ô¼ºÐ´ÁËÒ»¸öµ¼ÈëµÄ²»ÊǺÜÀíÏ룬ÀÏÊǶªÊý¾Ý£¬²»ÖªµÀÊÇʲôÔÒò£¬»¹Íû¸ßÊÖûָµã°¡£¡
ÓÃphpд³ÌÐòµ¼Èë°É£¡ÕâÑù¾Í²»»áÓÐÊý¾Ý¶ªÊ§ÁË£¬Ö»ÊÇËÙ¶È»áÂýµã¡£
ÎÒµ½ÊÇÓÃPHPдÁËÒ»¸ö£¬µ«ÊDz»ÊǺÜÀíÏëÄØ¡£ÀÏÊǶªÊ§Êý¾Ý£¬²»ÖªµÀÔõôµÄÎÊÌâ¡£ÓÃPHPҪдºÜ¶àµÄÀàÐÍת»»µÄºÜÂé·³£¬»òÐíÄãÓиüºÃµÄ½â¾ö°ì·¨£¿
Êý¾ÝÁ¿´ó¸Å¶à´ó£¿Íâ¼ü¹ØÁª¹ØÏµ¸´ÔÓô£¿SPÖ®Àà´òËãÔõô´¦Àí£¿µ¼Èëµ½mysql´òËãÓÃÄÄÖÖÒýÇæ£¿
Êý¾Ý²»¶à£¬×î¶àµÄÒ²¾Í3ÍòÀ´Ìõ£¬Ã»ÄãÏëµÄÄÇô¸´Ôӵġ£Ö»ÊÇÒª°ÑÊý¾ÝŪ¹ýÀ´¾ÍÍêÊÂÁË¡£
mssqlÖÐ×Ö¶ÎÀàÐÍΪnvarchar()µÄÒªÓÃconvert()º¯Êýת»»³Évarchar()²Å¿ÉÒÔÔÚmysqlÖб£´æ¡£
Õâ¸öÎÒµ½×ªÁË¡£
×Ô¼º¶¨Ï£¬Ã»È˰ïæÂð£¿
Ñ»·Êý¾Ý,²åÈë. ¾ÍÕâô°ì¾ÍOKÁË.
ûÓÐÀí½âÄãËù˵µÄ¶ªÊý¾ÝÊÇʲô¸ÅÄî. ÀíÂÛÉÏ,¶ªÊý¾Ý,Ö»ÊÇÄãÉú³ÉµÄ²åÈëSQLÓÐÎÊÌâ.
ÐÞÕýÉú³ÉSQLµÄBUG¾ÍOKÁË.
Ïà¹ØÎÊ´ð£º
SQL code:
sql2005£¬sql2008
SELECT
±íÃû=CASE WHEN a.colorder = 1 THEN d.name ELSE '' END,
±í˵Ã÷=CASE WHEN a.colorder = 1 THEN isnull(f.value, '') ELSE '' END ,
×Ö¶ÎÐòºÅ=a.colorder ,
×Ö¶ÎÃ ......
±íA
SQL code:
autoID outDate type resultDate
1 2010-05-10 11£º12£º03 1 null
2 2010-05-10 15£º10£º03 0 n ......
select case null
when '' then '1'
when null then '2' --ΪʲôûÓÐÔÚÕâ¸öλÖÃÅжϳöÀ´
else '3'
end a
select 1 a,2 b into #a
select isnull(b,0) b from #a where a=2
--bÁÐû ......
ÓÐÁ½¸ö±í£¬ÊýÁ¿¼¶ÔÚ3000w×óÓÒ£¬
Ïë²é¿´¾ßÌåµÄÊýÁ¿£¬ÓÃselect Count(*) ËÙ¶ÈÌ«Âý£¬
֮ǰ¿´µ½ËµÔÚsysindexesÖÐÓÐrows ÁУ¬ µ«ÊÇÎÒ·¢ÏÖ£¬ÕâÁ½¸öµÄÖµ²»Ò»Ñù£¬Ôõô»ØÊ°¡£¿
лл
ÓÐÈËÄܻشðÒ»ÏÂÂð? ²»ÊǺÜÃ÷°×°¡
Ò ......