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;
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持好代码网。