数据仓库服务 GAUSSDB(DWS)-循环语句:FORALL批量查询语句

时间:2024-04-12 10:20:15

FORALL批量查询语句

语法图

图5 forall::=

变量index会自动定义为integer类型并且只在此循环里存在。index的取值介于low_bound和upper_bound之间。

示例

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CREATE TABLE hdfs_t1 (
  title NUMBER(6),
  did VARCHAR2(20),
  data_peroid VARCHAR2(25),
  kind VARCHAR2(25),
  interval VARCHAR2(20),
  time DATE,
  isModified VARCHAR2(10)
) 
DISTRIBUTE BY hash(did);

INSERT INTO hdfs_t1 VALUES( 8, 'Donald', 'OConnell', 'DOCONNEL', '650.507.9833', to_date('21-06-1999', 'dd-mm-yyyy'), 'SH_CLERK' );

CREATE OR REPLACE PROCEDURE proc_forall()
AS 
BEGIN 
    FORALL i IN 100..120 
        insert into hdfs_t1(title) values(i);
END; 
/

--调用函数
CALL proc_forall();

--查询存储过程调用结果
SELECT * FROM hdfs_t1 WHERE title BETWEEN 100 AND 120;

--删除存储过程和表
DROP PROCEDURE proc_forall;
DROP TABLE hdfs_t1;
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