PgSQl临时表创建及应用实例解析

创建前可先删除

drop table tmp0

创建临时表

select * into temp table tmp0 from 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(
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;

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数据运维技术 » PgSQl临时表创建及应用实例解析