To remove a constraint, use theDROP CONSTRAINTclause in theALTER TABLEstatement. If you wish to drop the unique constraint on the “Email” column: <br> ALTER TABLE Customers<br> DROP CONSTRAINT UQ_Email;<br> 4.
How to Rename Table in SQL? It happens that we want to rename the table sometime after we have created it. ALTER TABLE statement is used to rename the table. ALTER TABLE table_name RENAME TO table_name_new; If we want to alter the table name ‘STUDENTS’, it can be done as below....
Retrieving column names from a table inSQLis a common task that database administrators and developers often perform. Furthermore, this process can be useful for dynamic SQL operations. In this tutorial,we’ll explore several methods to retrieve column names in SQL. To begin with, we’ll cover...
http://www.techonthenet.com/sql/tables/alter_table.php Thanks&Regards, Arunabathan.G Thursday, February 23, 2012 6:12 AM sp_RENAME 'TableName.[OldColName]' , '[NewColName]', 'COLUMN' Thursday, February 23, 2012 6:15 AM use this to rename column of table ...
To rename a column In Object Explorer, right-click the table to which you want to add columns and chooseDesign. The table opens in Table Designer. UnderColumn Name,select the name you want to change and type a new one. The column is renamed in your table as soon as you exit the cell...
-new_col_namerepresents new/modified column name. Example # 1: How to Rename a Table’s Column in Postgres? Follow the below-given steps to learn howRENAME COLUMNcommand works inPostgreSQL: Step 1: Choose a Database Open theSQL SHELLand establish a connection with a database using the“\...
To rename a table in Oracle SQL, use the ALTER TABLE statement, in the same way as MySQL and PostgreSQL: ALTER TABLE old_name RENAME TO new_name; You simply add in your current table name and the new table name and run the command. There’s no need to specify the schema name. For...
How to rename a table in SQL Server Thesp_renameis a stored procedure which helps to rename tables in SQL Server and the usage syntax will be like the below: 1 sp_rename'old_table_name','new_table_name' The result outputs of this procedure might be 0 or non-zero values. 0 value ...
RENAMETABLEold_table_nameTOnew_table_name; The old table (old_table_name) must exist, and the new table (new_table_name) must not. If the new tablenew_table_namedoes exist, the statement will fail. In addition to the tables, we can use theRENAME TABLEstatement to renameviews. ...
by assigning it a new name. Table aliases are employed to rename a table in a particular SQL statement. The databases don’t alter the table’s name; the renaming is only a temporary change. For the sake of a specific SQL query, the fields of a table are renamed using column aliases....