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SQL code:

create procedure(in w varchar(20),out c int)
begin
set @sqlcount=concat('select count(*) into @c from scms_product where ',w);
prepare stm1 from @sqlcount;
execute stm1;
set c=@c;
set @sql=concat('select * from scms_product where ',w);
prepare stm2 from @sql;
execute stm2;
end


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PHP code:

$rs=$mysqli->query("call p5('cateid=5',@c)");
$res=$mysqli->query("select @c");
$row=$res->fetch_row();
echo $row[0];


ÔËÐеÄʱºò¾Í»á³öÏÖ´íÎóÌáʾ£¬Call to a member function fetch_row() on a non-object  Èç¹ûÎÒÈ¥µô´æ´¢¹ý³ÌÖеÄ
set @sql=concat('select * from scms_product where ',w);
prepare stm2 from @sql;
execute stm2;
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c#¿ØÖÆMysql ʵÏÖ×Ô¶¯É¾³ý¹¦ÄÜ - .NET¼¼Êõ / C#

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PHP code:

<?php
$str="select * from product wh ......
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