Dataset

Create dataset Alter schema set options Drop dataset

Tables

Create table Create table as select Create table like Create table copy Create table options Create external table Alter column drop not null Create temp table Alter column set options Alter column change datatype Alter table set options Alter table rename Alter table add column Alter table drop column Drop temp table Drop table Drop external table

Snapshot Tables

Create Snapshot table List of snapshots Restore snapshot table Copy to Snapshot table Drop snapshot table

Views

Create view Create Materialized view Alter view set options Alter materialized view options Drop view Drop materialized view

Routines

Create Stored Procedure Create Function Create row access policy Create table function Drop function Drop table function Drop Procedure Drop row access policy

DML

INSERT values INSERT from a table INSERT values with subquery UPDATE statement UPDATE from table MERGE Statement DELETE statement TRUNCATE table

Home » Bigquery » Tutorials » Alter column drop not null

BigQuery Alter column drop NOT NULL constraint

Modify a column to remove NOT NULL constraint in a BigQuery table

Alter column drop not null example

\nALTER TABLE mydataset.Employee\nALTER COLUMN Name\nDROP NOT NULL\n

Explanation

Removes a NOT NULL Constraint from a BigQuery table

Syntax reference

ALTER TABLE [IF EXISTS] [[project_name.]dataset_name.]table_name\nALTER COLUMN [IF EXISTS] column DROP NOT NULL