如何根据IF条件执行Mysql SELECT语句？

Question

I want to combine 2 mysql calls into one with and if condition. This is what I currently have:

IF
mysql_query("SELECT File FROM DB.ShoePics WHERE Cover='1' AND ShoeID='$ShoeID' LIMIT 1")
Else
mysql_query("SELECT File FROM DB.ShoePics WHERE Cover='0' AND ShoeID='$ShoeID' LIMIT 1")

I guess it would look something similar to this but I know its incorrect:

mysql_query("SELECT File FROM DB.ShoePics WHERE IF(Cover='1')ELSE(Cover='0') AND ShoeID='$ShoeID' LIMIT 1")

Can someone show me how? thanks!

Answer 1

使您的查询像

SELECT File FROM DB.ShoePics WHERE (Cover='1' OR Cover='0') AND ShoeID='$ShoeID' LIMIT 1

Answer 2

SELECT File 
FROM DB.ShoePics 
WHERE  
    CASE WHEN CONDITION=1 THEN Cover='1' ELSE Cover='0' END
    AND ShoeID='$ShoeID' LIMIT 1"

Answer 3

mysql_query（“从DB.ShoePics中选择文件（Cover ='1'AND ShoeID ='$ ShoeID'LIMIT 1”）或（Cover ='0'AND ShoeID ='$ ShoeID'LIMIT 1“）