1. 关于配置项的关系,以下类图展示了DECLARE变量与存储过程及 SQL 语句之间的关系: MySQL+DECLARE(variable_name: String, datatype: String)+SET(variable_name: String, value: any)+SELECT(variable_name: String)DECLARESETSELECT 调试步骤 调试DECLARE引用变量相关问题时,可以采取以下步骤,一步步确认问题的根源: ...
15:10:27 declare @val1 int set @val1=4 print @myvariable Error Code: 1064. You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'declare @myvariable int set @myvariable=4 print @myvariable' at line ...
How to fix error “You have an error in your syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near… ”? Kickstart YourCareer Get certified by completing the course Get Started Print Page ...
Cursor declarations must appear before handler declarations and after variable and condition declarations. A stored program may contain multiple cursor declarations, but each cursor declared in a given block must have a unique name. For an example, see Section 15.6.6, “Cursors”. ...
DECLARE EXIT HANDLER FOR SQLWARNING BEGIN END; Otherwise, put the cleanup statements in the handler body: DECLARE EXIT HANDLER FOR SQLWARNING BEGIN block cleanup statements END; To continue execution, set a status variable in a CONTINUE handler that can be checked in the enclosing block to det...
mysql>CREATETABLEtest.t(s1INT,PRIMARYKEY(s1));Query OK, 0 rows affected (0.00 sec)mysql>delimiter//mysql>CREATEPROCEDUREhandlerdemo()BEGINDECLARECONTINUEHANDLERFORSQLSTATE'23000'SET@x2=1;SET@x=1;INSERTINTOtest.tVALUES(1);SET@x=2;INSERTINTOtest.tVALUES(1);SET@x=3;END;//Query OK, 0 ...