这篇文章主要介绍了PgSQl临时表创建及应用实例解析,文中通过示例代码介绍的非常详细,对大家的学习或者工作具有一定的参考学习价值,需要的朋友可以参考下
创建前可先删除drop table tmp0创建临时表select * into temp table tmp0 from xxx create index idx_tmp0_inner_cd on tmp0(inner_cd);查看临时表是否创建,返回0表示未创建,1为创建select count(*) from pg_class where relname = 'tmp0'或者用下面,下面语句在pg和mysql中都适用Create Table If Not Exists temp.MyTable(xxx varchar (20) Primary key ,
thTime varchar (20) ,
name varchar (20)
)同样可以用在删除表中:DROP TABLE If Exists temp.mjp_temp_update_log应用例子:SELECT
ids,
code,
INTO TEMP TABLE tmp0
FROM
TEMP .m_product_x
WHERE
TEMP .m_product_x.ids = ''
GROUP BY
TEMP .m_product_x.code,
TEMP .m_product_x.ids;
CREATE INDEX idx_tmp0_inner_cd ON tmp0 (code);
SELECT
*
FROM
TEMP .m_product
INNER JOIN tmp0 ON TEMP .m_product.code = tmp0.code
WHERE
TEMP .m_product.ids = ''
ORDER BY
tmp0.xx,
tmp0.ss;
DROP TABLE tmp0;
