这两个月经常使用postgresql,总结一些经常使用的语句: --创建表 CREATE TABLE customers ( customerid SERIAL primary key , companyname character varying, contactname character varying, phone character varying, country character varying ) --修改字段 ALTER TABLE ticket_report_group_t
语法:select 字段 from 表名 into outfile 路径 示例txt:select * from stu_class into outfile './stu_class.text'; 示例csv:select * from stu_class into outfile './stu_class.text'; 如果需要按照指定格式分隔数据呢? 使用可选选项:fields terminated by "-"; 示例:select * from stu_class into
mysql -uroot -p -e "use database;sql语句:" > a.csv 举例: mysql -uroot -p -e "use main;select b.* from point a left join user b on a.user_id = b.id where a.trade_type = 'CLASS' AND a.ctime > '2018-05-28' and a.ctime < '2018-06-01';"