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  • How to insert data from one table to another in MySQL?

    @babita.dhami
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    We can insert data from one table to another in MySQL. For this we use the INSERT INTO SELECT statement that selects the data from on table and inserts that data into another table.

    INSERT INTO SELECT Syntax

    We can select and insert all the columns from one table to another table:

    1. INSERT INTO table2
    2. SELECT * FROM table1;

    Or we can select and insert only the columns we want to insert into another table:

    1. INSERT INTO table2
    2. (column_names)
    3. SELECT column_names
    4. FROM table1;

    Example:

    We have two tables with the following values.

    1.     user
    2.  
    3. id  user_name     country   
    4. .......................................
    5. 1   John           Canada     
    6. 2   Chris          America        
    7. 3   Joy            London         
    8. 4   Jenny          Korea                              
    9.  
    10.     student
    11.  
    12. id  student_name     country   
    13. .......................................
    14. 1   Rony             Canada     
    15. 2   Bonney           USA                
    16. 3   Kat              Mexico

    SQL INSERT INTO SELECT Examples

    Insert only a few columns from "student" into "user":

    Example

    1. INSERT INTO user (user_name, Country)
    2. SELECT student_name, country FROM student;

    Result

    1. user
    2.  
    3. id  user_name     country   
    4. .......................................
    5. 1   John           Canada     
    6. 2   Chris          America        
    7. 3   Joy            London         
    8. 4   Jenny          Korea
    9. 5   Rony           Canada     
    10. 6   Bonney         USA                
    11. 7   Kat            Mexico

    Insert only the student who has country as USA into "user":

    Example

    1. INSERT INTO user (user_name, Country)
    2. SELECT student_name, country FROM student
    3. WHERE country='USA';

    Result

    1. user
    2.  
    3. id  user_name     country   
    4. .......................................
    5. 1   John           Canada     
    6. 2   Chris          America        
    7. 3   Joy            London         
    8. 4   Jenny          Korea   
    9. 5   Bonney         USA
    mysql insert select insert into database
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