snowflake alter column data type

Garo_Gorille answered on September 17, 2020 Popularity 9/10 Helpfulness 7/10

answer snowflake alter column data type

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snowflake alter column data type

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alter table t1 alter c4 set data type varchar(50)

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Source: docs.snowflake.com

Tags: alter-column sql

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Contributed on Feb 24 2021

Garo_Gorille

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alter table TABLE_NAME add column TEMP_COLUMN TIMESTAMP_LTZ(9);

update TABLE_NAME t1
  set t1.TEMP_COLUMN = TO_TIMESTAMP_LTZ(t2.TIMESTAMP_NTZ_COLUMN_NAME)
  from TABLE_NAME t2
  where t1.TEMP_COLUMN = t2.TIMESTAMP_NTZ_COLUMN_NAME

// if you don't want troubles create a new copy of table and use SWAP WITH instead
alter table aws_config rename column TIMESTAMP_NTZ_COLUMN_NAME to TIMESTAMP_NTZ_COLUMN_NAME_OLD;
alter table aws_config rename column TEMP_COLUMN to TIMESTAMP_NTZ_COLUMN_NAME;

alter table aws_config drop column TIMESTAMP_NTZ_COLUMN_NAME_OLD

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Source: Grepper

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Contributed on Sep 17 2020

Danny Mor

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snowflake alter column data type

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