sql="delete from xiaolei where dalei_mz='"&dalei_mz&"'"
问题描述:
sql="delete from xiaolei where dalei_mz='"&dalei_mz&"'"
sql语句中第二个等号后面的单引号是什么意思;单引号后面的双引号又是什么意思,单引号是定界符;双引号是什么(加什么)
答
单引号是SQL语句的一部分因为最终的SQL语句是 delete from xiaolei where dalei_mz='dalei_mz' 所以是字符串: delete from xiaolei where dalei_mz=' (所以在两端加上双引号).再加上dalei_mz这个变量的值, 再在后...