1.表结构 create table t_student( id ) primary key, name ), birthday date ); increment ; insert into t_student values(seq_t_student.nextval,'张三',sysdate); insert into t_student values(seq_t_student.nextval,'李四',to_date('1990-01-01 13:13:13','yyyy-mm-dd h
MySQL将表a中查询的数据插入到表b中 假设表b存在 insert into b select * from a; 假设表b不存在 create table b as select * from a; 扩展: 将b表中的某写字段值插入到a表中 insert into a (userID,userName) select b.userID,b.userName from tr_ajax_chat_messages; 将a表和b表userID相等的值保存到a表 update a set a.use
先创建一个目录:比如 Create or Replace directory DATA_PUMP_DIR as 'D:\DataPipe'; 然后给导入导出的用户赋权限: Grant read,write on directory DATA_PUMP_DIR to zsdx; expdp bjcyqwsj_zcgl/bjcyqwsj_zcgl@ORCL directory=DATA_PUMP_DIR DUMPFILE=zcgl_20160702.dmp TABLESPACES=bjc