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one The ALTER command is data definition language (DDL). Update command is a data manipulation language. Two The Alter command will perform actions at the structure level instead of the data level.

INFORMAT= specifies the informat to be used when SAS accesses data from a table or view. You can change one permanent informat to another by using the ALTER statement. PROC SQL stores informats in its ...

Adding a primary key using alter command:alter command is generally used to modify table . it can be used to add columns or to remove columns. using alter command we can also add or remove a key from ...

Sometimes we need to drop a column that we don't need further from the table. We can do this by using DROP keyword with ALTER command. Syntax: To drop/delete the column from a table, use the following ...