MySQL copies data from one database to a table in another database. The two tables have the same structure

If you want to copy the data in a table in one database to another database or the same database, you can take the following methods: 

1. Tables with the same table structure, and in the same database (eg, table1, table2) 

Sql: insert into table1 select * from table2 (full copy) 

      insert into table1 select distinct * from table2 (do not copy duplicate records) 

      insert into table1 select top 5 * from table2 (top five records) 

2. Tables are not in the same database (eg, db1 table1, db2 table2) 

sql : insert into db1.table1 select * from db2.table2 (full copy) 

     insert into db1.table1 select distinct * from db2.table2 (do not copy duplicate records) 

     insert into tdb1.able1 select top 5 * from db2.table2 (the first five record) 

first build the table, and execute the statement, it's ok! ! 
The table can also be copied. For the table to be copied, click 3 Info, various information will be displayed, select DDL Information, copy the following statement to the above Query, remember to select the database as the target database, and execute the statement! ! 
Remember db1.table1. Can not save Kazakhstan! ! You can enter as many points as you want, but in the end it's all one point! ! 



If the structures of the two tables are different, and you want to select certain items as the objects to be inserted, you can refer to the following statement to rewrite: 
INSERT into db_ds_edu.t_exam_student(stu_id,stu_number,stu_name,school_id,campus_id,grade_id,class_id,xuebu_id) 
  SELECT stu.id 
     , stu.student_num 
    ,person.name 
     , stu.school_id 
     , stu.campus_id 
     , stu.grade_id 
     , stu.clas_id 
     , stu.xuebu_id 
FROM 
  db_ds.t_stu_info AS stu 
    ,db_ds.t_p_person_info as person 
    WHERE stu.person_id = person.id 

is to select some items inserted into a table of a database, and then select data from the data table of the target database, Just match it up