That's why I'm posting it here.Īltrough MSDN says, that this can't be done from T-SQL, but from SQL Management Studio. Some SQL guru is probably screaming right now that this would screw up something at a system level. WHERE table_name = 'TargetTable' AND table_schema = 'dbo' AND column_name = 'TheOldColumn' Move the old column's ordinal position to the bottom. WHERE table_name = 'TargetTable' AND table_schema = 'dbo' AND column_name = 'TheNewColumn' Move the new column's ordinal position to the top. WHERE table_name = 'TargetTable' AND table_schema = 'dbo' AND column_name = 'TheNewColumn') Basically add the new column, assign it to position 1, then assign the old column to position 2. This example assumes there is a table with 2 columns. I haven't tried this, but it seems the following approach may work. Is it possible to simply add the desired columns via ALTER TABLE then change the ORDINAL_POSITION for the table in Information_Schema.Columns? ROWGUIDCOL, timestamp data type, computed column (or used in a computed column), associated with a DEFAULT definition (may still adjust length, precision & scale.) you cannot modify an existing column to add the IDENTITY property.Quote:The Information_Schema.Columns table has an ORDINAL_POSITION field. The following columns may not be modified: To modify a table column you may need to: Delete statistics, Remove Primary, Foreign Key or Check constraints, Delete Indexes. I am adding a cost column as I feel it is missing from the dataset. ![]() WITH CHECK / WITH NOCHECK - Is data in the table validated against the new FOREIGN KEY or CHECK constraint. Find out the max value of the Identity column column in SQL Server, lets say its 3000. Max - Applies only to the varchar, nvarchar, and varbinary data types for storing 2^31-1 bytes of character / binary / Unicode data. PRIMARY KEY constraints default to CLUSTERED, and UNIQUE constraints default to NONCLUSTERED.įOREIGN KEY REFERENCES - A constraint to provide referential integrity for the data, requires a UNIQUE INDEX on the referenced table. NULL / NOT NULL - Whether the column can accept null values.ĬLUSTERED | NONCLUSTERED - The type of index is created for a PRIMARY KEY or UNIQUE constraint. ![]() ![]() NOT FOR REPLICATION - Do not enforce constraints for the replication agent (IDENTITY, FOREIGN KEY and CHECK constraints.)ĬONSTRAINT - Define a PRIMARY KEY, NOT NULL, UNIQUE, FOREIGN KEY, or CHECK constraint. ONLINE - Make underlying tables and associated indexes are available during the index operation. IDENTITY - An identity column, one per table: tinyint, smallint, int, bigint, decimal(p,0), or numeric(p,0) TEXTIMAGE_ON - Specifies an alternate storage filegroup for columns of type: text, ntext, image, xml, varchar(max), nvarchar(max), varbinary(max), and CLR user-defined type.ĬONTENT - Allow multiple top-level elements in each instance of the xml data type.ĭOCUMENT - Allow only one top-level element in each instance of the xml data type.ĭEFAULT - A value provided for the column when nothing is explicitly supplied during an insert. The name 'timestamp' is used if no name is specified for a timestamp data type column. ALTER TABLE table ALTER COLUMN column xml_schema_collection ) ]ĪLL - All constraints or triggers in the table are enabled or disabled.Ĭolumn - A maximum of 128 characters.
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