我有一个senario,其中一个名为have的列是varchar,它包含两种类型的值,如下所示:5.00% type Percentage£30.00 type fixed£3.00 type fixed$sql5 = "SELECT (commission+0) as comm , $cashback_table.* FROM $cashback_table where rg_
com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure
Could not get JDBC Connection; nested exception is com.mysql.jdbc.exceptions.jdbc4applications.properties文件的方式:
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