Alter Columns?

Apr 1, 2004

Hello,

I am trying to edit several tables that were imported in tab-delimited format from text files. I am trying to generate a script that will alter the data type for several different columns.

I have succesfully edited a single column with the following code:
USE THCIC
ALTER TABLE PudfTest
ALTER COLUMN
DISCHARGE VARCHAR(6) NULL

However, I have need to create a script that will change the data type for over 100 columns. So far, everything I've read tells me that multiple 'alter column' statements cannot be run in a single query. I'm hoping someone can shed some light on this, or at least point me in another direction so that I won't have to manually change the data type for every column in each of the tables.

Any help would be greatly appreciated.
Thanks!

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Alter Multiple Columns In SQL

Mar 20, 2008

This does not work, incorrect syntax... Please help: ALTER TABLE dbo.classifieds_HotelAds ALTER COLUMN (
HasValetParking varchar(1) NULL,
HasContinentalBreakfast varchar(1) NULL,
HasInRoomMovies varchar(1) NULL,
HasSauna varchar(1) NULL,
HasWhirlpool varchar(1) NULL,
HasVoiceMail varchar(1) NULL,
Has24HourSecurity varchar(1) NULL,
HasParkingGarage varchar(1) NULL,
HasElectronicRoomKeys varchar(1) NULL,
HasCoffeeTeaMaker varchar(1) NULL,
HasSafe varchar(1) NULL,
HasVideoCheckOut varchar(1) NULL,
HasRestrictedAccess varchar(1) NULL,
HasInteriorRoomEntrance varchar(1) NULL,
HasExteriorRoomEntrance varchar(1) NULL,
HasCombination varchar(1) NULL,
HasFitnessFacility varchar(1) NULL,
HasGameRoom varchar(1) NULL,
HasTennisCourt varchar(1) NULL,
HasGolfCourse varchar(1) NULL,
HasInHouseDining varchar(1) NULL,
HasInHouseBar varchar(1) NULL,
HasHandicapAccessible varchar(1) NULL,
HasChildrenAllowed varchar(1) NULL,
HasPetsAllowed varchar(1) NULL,
HasTVInRoom varchar(1) NULL,
HasDataPorts varchar(1) NULL,
HasMeetingRooms varchar(1) NULL,
HasBusinessCenter varchar(1) NULL,
HasDryCleaning varchar(1) NULL,
HasIndoorPool varchar(1) NULL,
HasOutdoorPool varchar(1) NULL,
HasNonSmokingRooms varchar(1) NULL,
HasAirportTransportation varchar(1) NULL,
HasAirconditioning varchar(1) NULL,
HasClothingAiron varchar(1) NULL,
HasWakeupService varchar(1) NULL,
HasMiniBarInRoom varchar(1) NULL,
HasRoomService varchar(1) NULL,
HasHairDryer varchar(1) NULL,
HasCarRentDesk varchar(1) NULL,
HasFamilyRooms varchar(1) NULL,
HasKitchen varchar(1) NULL,
HasMap varchar(1) NULL,
HasWiFi varchar(1) NULL,
GDSChainCode nvarvarchar(1) NULL,
GDSChainCodeName nvarchar(50) NULL,
DestinationID nvarchar(50) NULL,
DrivingDirections nvarchar(MAX) NULL,
NearbyAttractions nvarchar(MAX) NULL,
IANHotelID int NULL,HasClothingIron bit NULL
)
GO
COMMIT

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thanks,
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I need to perform this task. say I have a table that the columns are dates.

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When the new month comes I want the table to alter the columns automatically instead of manual how we do it now. The new Month table should delete [02-2015] and replace it with [03-2015].

table months:
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Dec 4, 2006

Hi all

ALTER TABLE <Table_Name> ALTER COLUMN <column_name> <Data_type>

above query alters the sigle column but how to alter multiple columns at time

saivyshnav
Junior DBA

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Jan 3, 2007

How do I alter multiple columns with one SQL statement?

I've tried :

ALTER TABLE epcs_benefit_plan ALTER COLUMN

abc1 varchar(3) not null,

abc2 varchar(3) not null

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Jun 9, 2015

I would like to alter view to add columns. My base table is populated by application and the base table name is always change. Is there any way to add some extra columns to this view.

One way is to create a sp to add columns and use the view inside the sp. But I would like to know is there any way to alter the view. 

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Mar 20, 2015

I have a VIEW which is dynamically generated through complex dynamic SQL. Unfortunately the dynamic SQL uses "Select * from table" to select the columns because the programmer did that to reduce the amount of code in the dynamic SQL string as the code can't be debugged if it's too long.

Therefore, I have a VIEW with columns in it I don't need, and want to remove them from the view - I need to remove all columns with column names matching the syntax '%1%_2' .

The view is called TEMP_EXPORT_1

I can either use the code below to return a list of columns that I want removed:

select column_name from information_schema.columns

where table_name='TEMP_EXPORT_1' and column_name like '%1%_2'

Or I can use the code below to return the list of columns that I want to keep:

select column_name from information_schema.columns

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Now how would I go about altering TEMP_EXPORT_1 view so that it no longer has these columns? I know views don't have a drop statement...

Therefore I tried the following but I'm not sure of the syntax:

ALTER VIEW dbo.TEMP_EXPORT_1
AS
SELECT (select column_name from information_schema.columns
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Am I on the right track? how can I ALTER this view to remove these columns? ... I want to keep this separate from the code that generated the view as I want it as an optional procedure that can be run if needed.

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I am having problem when performing the alter table switch. Both tables are identical and have pk.

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CONSTRAINT [PKIDX_testSummary] PRIMARY KEY CLUSTERED

( [testresult_id] ASC )

WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON)

ON TResultsScheme (testresult_id) ) ON TResultsScheme (testresult_id)


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[testresult_id] [int] IDENTITY(1,1) NOT NULL,

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my code:
Alter table customers alter column age

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Hi guys,
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[Name]
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Thanks in advance,
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I have tried the code below, but getting syntax error...



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ALTER COLUMN
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I have also tried:

ALTER TABLE #CTE
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