Deleting a Column

The ALTER TABLE ... DROP COLUMN command is used to delete a column.

ALTER TABLE tableName DROP COLUMN|COLUMNS cols

**Table 1** DROP COLUMN parameters
Parameter	Description
tableName	Table name.
cols	Columns to be deleted. You can specify multiple columns.

ALTER TABLE table1 DROP COLUMN a.b.c
ALTER TABLE table1 DROP COLUMNS a.b.c, x, y

a.b.c indicates the full path of a nested column. For details about the nested column rules, see Adding a Column.

You can run the DESCRIBE command to check which column is deleted.

Parent topic: SparkSQL Schema Evolution and Syntax Description

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