Page History: Schema Change Scripts - SQL Server

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Page Revision: Thu, Nov 01, 2012, 9:32 AM

Sequence of Statements¶

• Drop foreign keys being created on existing tables
• Drop tables being created
• Drop columns being created
• Drop/recreate schema
• Create/alter tables
• Create primary keys
• Create foreign keys
• Populate lookup tables
  

Statement Syntax¶

Drop Column¶

if COL_LENGTH('TableName','ColumnName') is not null
    alter table dbo.TableName drop column ColumnName

Add Columns¶

alter table dbo.TableName ADD
     ColumnName  int      not null identity(1,1)
    ,ColumnName2 date     not null