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 Create temp table Alter column drop not null 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 table add column

BigQuery Alter table add column

Modify BigQuery table to add one or more new columns to an existing table schema

Alter table add column example

    ALTER TABLE mydataset.mytable
      ADD COLUMN A STRING;

Adding multiple new columns

    ALTER TABLE mydataset.mytable
      ADD COLUMN A STRING,
      ADD COLUMN IF NOT EXISTS B GEOGRAPHY,
      ADD COLUMN C ARRAY,
      ADD COLUMN D DATE OPTIONS(description="my description")

Syntax reference

ALTER TABLE [[project_name.]dataset_name.]table_name
ADD COLUMN [IF NOT EXISTS] column_name column_schema [, ...]