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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