< Sql Tutorial

Sql Table Rename/Alter

← Previous Next →


SQL RENAME TABLE

SQL RENAME TABLE syntax is used to change the name of a table. Sometimes, we choose non-meaningful name for the table. So it is required to be changed. Let's see the syntax to rename a table from the database.

  1.  ALTER TABLE table_name
  2. RENAME TO new_table_name;


Let us take an example of a table named "STUDENTS" to "ARTISTS"

ALTER TABLE STUDENTS  RENAME TO ARTISTS;

Optionally, you can write following command to rename the table.

RENAME old_table _name To new_table_name; 

 

SQL ALTER TABLE

The ALTER TABLE statement is used to add, modify or delete columns in an existing table. It is also used to rename a table. You can also use SQL ALTER TABLE command to add and drop various constraints on an existing table.

SQL ALTER TABLE Add Column

If you want to add columns in SQL table, the SQL alter table syntax is given below:

ALTER TABLE table_name ADD column_name column-definition;

 If you want to add multiple columns in table, the SQL table will be
 

ALTER TABLE table_name
ADD (column_1 column-definition,
           column_2 column-definition,
           .....
           column_n column-definition);

SQL ALTER TABLE Modify Column

If you want to modify an existing column in SQL table, syntax is given below:

ALTER TABLE table_name MODIFY column_name column_type;

If you want to modify multiple columns in table, the SQL table will be
 

ALTER TABLE table_name
MODIFY (column_1 column_type,
                  column_2 column_type,
                 .....
                  column_n column_type);

SQL ALTER TABLE DROP Column

The syntax of alter table drop column is given below:

 ALTER TABLE table_name DROP COLUMN column_name;

SQL ALTER TABLE RENAME Column

The syntax of alter table rename column is given below:

ALTER TABLE table_name RENAME COLUMN old_name to new_name;
← Previous Next →