How to Drop a Table Column with Dependent Objects in SQL Server?

Dropping Table Columns with Dependent Objects

When attempting to drop columns from a table using the ALTER TABLE DROP COLUMN syntax, you may encounter the error: "Msg 4922, Level 16, State 9, Line 2nALTER TABLE DROP COLUMN Failed because one or more objects access this column." This error occurs when the column you are trying to drop is referenced by other objects in the database, such as foreign key constraints or default values.

Solution: Remove Dependent Constraints

To successfully drop the column, you must first remove any constraints that depend on it. In this case, the error message references a default constraint named "DF__CompanyTr__Creat__0CDAE408." To drop this constraint, use the following syntax:

alter table CompanyTransactions drop constraint [df__CompanyTr__Creat__0cdae408];

Once the dependent constraints are removed, you can then execute the original query to drop the column:

alter table CompanyTransactions drop column [Created];

Code First Migrations

If you are using code first migrations to manage your database schema, this issue can arise if the migrations have become out of sync. In such cases, it is recommended to recreate the migrations and re-run them to ensure that the database is in a consistent state.

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