Add T-SQL table altering commands from Gist

src/tsql.md

@@ -23,3 +23,27 @@ FROM <database_name>.INFORMATION_SCHEMA.ROUTINES
 WHERE ROUTINE_TYPE = 'PROCEDURE'
 ORDER BY SPECIFIC_SCHEMA, SPECIFIC_NAME
 ```
+
+## Table altering, in T-SQL
+
+### Change table schema
+Change the schema on an existing table.
+```sql
+ALTER SCHEMA projectManagement
+TRANSFER dbo.RequestPriority
+```
+
+### Change column
+Alter a column in an existing table.
+```sql
+ALTER TABLE [projectManagement].[Task]
+ALTER COLUMN Name varchar(250) not null
+```
+
+### Add identity and primary key
+Add a new identity column to an existing table.
+```sql
+-- See http://stackoverflow.com/a/3698824/11912
+ALTER TABLE JobSupplies add Id INT IDENTITY
+ALTER TABLE JobSupplies add constraint PK_JobSupplies primary KEY(Id)
+```