--Disk-Based CREATE TABLE Syntax CREATE TABLE [ database_name . For more information about File Tables, see File Tables (SQL Server). ] table_name [ AS File Table ] ( [ ,...n ] [ PERIOD FOR SYSTEM_TIME ( system_start_time_column_name , system_end_time_column_name ) ] ) [ ON ] [ TEXTIMAGE_ON ] [ FILESTREAM_ON ] [ WITH ( [ FILESTREAM ] [ COLLATE collation_name ] [ SPARSE ] [ MASKED WITH ( FUNCTION = ' mask_function ') ] [ CONSTRAINT constraint_name [ DEFAULT constant_expression ] ] [ IDENTITY [ ( seed,increment ) ] [ NOT FOR REPLICATION ] [ GENERATED ALWAYS AS ROW [ HIDDEN ] ] [ NULL | NOT NULL ] [ ROWGUIDCOL ] [ ENCRYPTED WITH ( COLUMN_ENCRYPTION_KEY = key_name , ENCRYPTION_TYPE = , ALGORITHM = ' AEAD_AES_256_CBC_HMAC_SHA_256' ) ] [ [ , ...n ] ) ] [ ON ] | [ FOREIGN KEY ] REFERENCES referenced_table_name [ ( ref_column ) ] [ ON DELETE ] [ ON UPDATE ] [ NOT FOR REPLICATION ] | CHECK [ NOT FOR REPLICATION ] ( logical_expression ) ] [ , ...n ] ) ] [ ON ] | FOREIGN KEY ( column [ ,...n ] ) REFERENCES referenced_table_name [ ( ref_column [ ,...n ] ) ] [ ON DELETE ] [ ON UPDATE ] [ NOT FOR REPLICATION ] | CHECK [ NOT FOR REPLICATION ] ( logical_expression ) --Memory optimized CREATE TABLE Syntax CREATE TABLE [database_name . AS File Table Applies to: SQL Server 2012 through SQL Server 2017. You do not specify columns because a File Table has a fixed schema.
Is an expression that defines the value of a computed column.
A constraint can apply either to new data only (like a trigger) or to both new and existing data.
Constraint behavior depends on constraint state, as explained in .
SQL statements running in triggers follow the same rules that standalone SQL statements do.
Specifically: How Triggers and Constraints Differ Both triggers and constraints can constrain data input, but they differ significantly. For example, a trigger can prevent a DML statement from inserting a values that were inserted into the column before the trigger was defined or while the trigger was disabled.