DECLARE开始PL/SQL块的变量声明部分（不在每个变量之前使用）;
So if your procedure looks like MyPROCEDURE (IN varchar, OUT varchar) you call it like: CALL MyPROCEDURE("This string", @myvar); then you examine the value of the variable: SELECT @myvar; and it should hold the result. Try testing on a small procedure. ...
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...declare @local_variable data_type 声明时须要指定变量的类型, 能够使用set和select对变量进行赋值, 在sql语句中就能够使用@local_variable来调用变量...声明中能够提供值,否则声明之后全部变量将初始化为NULL。...比如:declare @id int declare @id int = 3 set @id=2 select id select...
oracle declare 的用法 在 Oracle 中,DECLARE 语句用于定义变量、游标或子程序。DECLARE 语句可以用于存储过程、 函数、触发器和包中,用于定义这些程序中使用的变量或游标。 DECLARE 语句的语法格式如下: sql Copy code DECLARE variable_name1 [CONSTANT | TYPE] [NOT NULL] [:= | DEFAULT] value1; variable_...
To continue execution, set a status variable in theCONTINUEhandler and check the status variable in the closed block to check whether the handler was called. The following example uses thedonevariable to achieve this: obclient> CREATE PROCEDURE proc2() ...
); 6 FOR i IN 1..3 LOOP 7 dbms_output.put ('Integer Varray:'||i); 8 dbms_output.put_line(':'||intArray(i)); 9 END LOOP; 10 11 END; 12 / Varray initialized as nulls. Integer Varray:1: Integer Varray:2: Integer Varray:3: PL/SQL procedure successfully completed. ...
CLOSE cursor_variable; When a cursor reaches the end of the output table, the FETCH statement will result in an execution error: 02000. But this error can be converted into a logical condition by a "continue handler": DECLARE EndOfData INTEGER; DECLARE CONTINUE HANDLER FOR SQLSTATE '02000'...
To continue execution, set a status variable in aCONTINUEhandler that can be checked in the enclosing block to determine whether the handler was invoked. The following example uses the variabledonefor this purpose: CREATE PROCEDURE p ()
Stored procedures or functions could use this variable in join operations. It let them improve performance and avoid cursor-like operations item-by-item. Although the table-based approach has been available for a long time, the SQL list of values as parameter is widely used for the following ...