How can we create a new MySQL table by selecting specific column/s from another existing table?
As we know that we can copy the data and structure from an existing table by CTAS script. If we want to select some specific column/s from another table then we need to mention them after SELECT. Consider the following example in which we have created a table named EMP_BACKUP1 by selecting a specific column ‘name’ from already existing table ‘Employee’ −
mysql> Create table EMP_BACKUP1 AS Select name from employee;
Query OK, 3 rows affected (0.25 sec)
Records: 3 Duplicates: 0 Warnings: 0
mysql> Select * from EMP_BACKUP1;
+--------+
| name |
+--------+
| Ram |
| Gaurav |
| Mohan |
+--------+
3 rows in set (0.00 sec)
We can observe that it copied only the data and structure of ‘name’ column from the ‘Employee’ table.
Published on 19-Feb-2018 12:26:34
