How do I modify a SQL database?

How do I edit an existing SQL table?

SQL UPDATE1First, indicate the table that you want to update in the UPDATE clause.2Second, specify the columns that you want to modify in the SET clause. The columns that are not listed in the SET clause will retain their original values.3Third, specify which rows to update in the WHERE clause.SQL UPDATE: Modify Existing Data in a Table By Examples - SQL Tutorial

How do you modify data in a database?

To modify data involves changing the contents of tables.1Modify data in your database.2Delete rows.3Insert rows.4Update rows.5Privileges on a database and on its objects.6Data integrity.7Interrupted modifications.8Backups and logs with IBM Informix database servers.Modify data - IBM

Can a database be modified?

You can use either SQL statements against an existing table or ObjectScript operations on the corresponding persistent class to modify the contents of an InterSystems IRIS® data platform database. You cannot modify a persistent class (table) that is defined as READONLY.

Which command is used to modify existing database?

The SQL ALTER TABLE command is used to change the structure of an existing table. It helps to add or delete columns, create or destroy indexes, change the type of existing columns, or rename columns or the table itself.