Help Center/ MapReduce Service/ Component Operation Guide (LTS)/ Using Hudi/ Hudi Schema Evolution/ Hudi Schema Evolution and Syntax/ DROP COLUMN
Updated on 2025-03-17 GMT+08:00
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DROP COLUMN

Function

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

Syntax

ALTER TABLE tableName DROP COLUMN|COLUMNS cols

Parameter Description

Table 1 DROP COLUMN parameters

Parameter

Description

tableName

Table name.

cols

Columns to be deleted. You can specify multiple columns.

Example

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 ADD COLUMNS.

Response

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