Update SQL db schema(table definition and sp) only without losing data

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We have a one Sql server db, Now we have changed in the db table schema and stored procedure so we are try to update db schema only without losing data.
Is it possible?
If Yes then how?

What I have tried:

we tried out everything what we can.

Posted 18-Jun-18 2:43am

Member 13305881

Updated 18-Jun-18 8:08am

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Naga Sindhura 18-Jun-18 8:53am

check this one once. It may help you.
https://stackoverflow.com/questions/17571233/how-to-change-schema-of-all-tables-views-and-stored-procedures-in-mssql

MadMyche 18-Jun-18 9:51am

What type of schema changes are needed? Posting before/after DDLs would be helpful.

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ZurdoDev · Answer 1 · 2018-06-18T08:09:00

What did you try? Usually, it's a very simple thing to do.

For example, if you added a column then do:

SQL

IF NOT EXISTS(SELECT 1 FROM sys.columns WHERE Name = N'some_column' AND Object_ID = Object_ID(N'dbo.[some_table]'))
BEGIN
	ALTER TABLE [some_table] ADD some_column VARBINARY(MAX) NULL
END
GO

or if you are altering a column that will not lose data with the new data type do

SQL

ALTER TABLE someTable ALTER COLUMN someColumn NVARCHAR (MAX) NULL