达梦数据库动态SQL之SELECT...INTO单行数据返回及多行数据返回
作者:互联网
1、给普通类型变量赋单个值
CREATE OR REPLACE PROCEDURE T_1208(ID INT)
AS
Z INT;
BEGIN
EXECUTE IMMEDIATE 'SELECT TOP 1 ID FROM D_I WHERE ID>? ' INTO Z USING ID;
PRINT Z;
END;
执行结果
[执行语句1]:
CALL T_1208(15);
执行成功, 执行耗时2毫秒. 执行号:671
63
2、给变量赋多个值
2.1、SELECT INTO 中包含多行错误
CREATE OR REPLACE PROCEDURE T_1208(ID INT)
AS
Z INT;
BEGIN
EXECUTE IMMEDIATE 'SELECT ID FROM D_I WHERE ID>? ' INTO Z USING ID;
PRINT Z;
END;
执行结果
说明:由于返回的行数为多行而SELECT … INTO 不支持返回多行。
2.2、使用嵌套表集合类型结合BULK COLLECT参数返回多个值(一)
CREATE OR REPLACE PROCEDURE T_1208(ID INT)
AS
TYPE ZQH IS TABLE OF D_I.ID%TYPE;
Z ZQH;
BEGIN
EXECUTE IMMEDIATE 'SELECT ID FROM D_I WHERE ID>? ' BULK COLLECT INTO Z USING ID;
PRINT Z(1);
END;
执行结果
2.3、使用嵌套表集合类型结合BULK COLLECT参数返回多个值(二)
CREATE OR REPLACE PROCEDURE T_1208(ID INT)
AS
TYPE ZQH IS TABLE OF D_I%ROWTYPE;
Z ZQH;
BEGIN
EXECUTE IMMEDIATE 'SELECT * FROM D_I WHERE ID>? ' BULK COLLECT INTO Z USING ID;
PRINT Z(1).ID;
END;
执行结果
总结:动态SQL中的SELECT …INTO不支持多行数据返回,要使用多行数据返回需要使用SELECT … BULK COLLECT INTO 结合集合类型。
链接: 达梦技术社区https://eco.dameng.com/.
标签:返回,...,1208,INT,INTO,BULK,达梦,ID,SELECT 来源: https://blog.csdn.net/a406716524/article/details/122014240