Оператор CREATE TABLE

Команды SQL

BLOB

BYTE

BINARY

· Последовательные типы данных - используются для представления возрастающих числовых последовательностей.

§ SERIAL - тип данных на основе INTEGER, позволяющий сформировать уникальное значение (например, для первичного ключа). При добавлении записи СУБД автоматически присваивает полю данного типа значение, получаемое из возрастающей последовательности целых чисел.

Оператор используется для создания новых таблиц базы данных.

CREATE TABLE имя_таблицы (
имя_столбца тип_данных [NULL | NOT NULL] [CONSTRAINTS],
имя_столбца тип_данных[NULL|NOT NULL] [CONSTRAINTS] , ..... );

CREATE TABLE

[ database_name . [ schema_name ] . | schema_name . ] table_name

( { <column_definition> | <computed_column_definition> }

[ <table_constraint> ] [ ,...n ] )

[ ON { partition_scheme_name ( partition_column_name ) | filegroup

| "default" } ]

[ { TEXTIMAGE_ON { filegroup | "default" } ]

[ ; ]

<column_definition> ::=

column_name <data_type>

[ COLLATE collation_name ]

[ NULL | NOT NULL ]

[

[ CONSTRAINT constraint_name ] DEFAULT constant_expression ]

| [ IDENTITY [ ( seed , increment ) ] [ NOT FOR REPLICATION ]

]

[ ROWGUIDCOL ] [ <column_constraint> [ ...n ] ]

<data type> ::=

[ type_schema_name . ] type_name

[ ( precision [ , scale ] | max |

[ { CONTENT | DOCUMENT } ] xml_schema_collection ) ]

<column_constraint> ::=

[ CONSTRAINT constraint_name ]

{ { PRIMARY KEY | UNIQUE }

[ CLUSTERED | NONCLUSTERED ]

[

WITH FILLFACTOR = fillfactor

| WITH ( < index_option > [ , ...n ] )

]

[ ON { partition_scheme_name ( partition_column_name )

| filegroup | "default" } ]

| [ FOREIGN KEY ]

REFERENCES [ schema_name . ] referenced_table_name [ ( ref_column ) ]

[ ON DELETE { NO ACTION | CASCADE | SET NULL | SET DEFAULT } ]

[ ON UPDATE { NO ACTION | CASCADE | SET NULL | SET DEFAULT } ]

[ NOT FOR REPLICATION ]

| CHECK [ NOT FOR REPLICATION ] ( logical_expression )

}

<computed_column_definition> ::=

column_name AS computed_column_expression

[ PERSISTED [ NOT NULL ] ]

[

[ CONSTRAINT constraint_name ]

{ PRIMARY KEY | UNIQUE }

[ CLUSTERED | NONCLUSTERED ]

[

WITH FILLFACTOR = fillfactor

| WITH ( <index_option> [ , ...n ] )

]

[ ON { partition_scheme_name ( partition_column_name )

| filegroup | "default" } ]

| [ FOREIGN KEY ]

REFERENCES referenced_table_name [ ( ref_column ) ]

[ ON DELETE { NO ACTION | CASCADE } ]

[ ON UPDATE { NO ACTION } ]

[ NOT FOR REPLICATION ]

| CHECK [ NOT FOR REPLICATION ] ( logical_expression )

]

< table_constraint > ::=

[ CONSTRAINT constraint_name ]

{

{ PRIMARY KEY | UNIQUE }

[ CLUSTERED | NONCLUSTERED ]

(column [ ASC | DESC ] [ ,...n ] )

[

WITH FILLFACTOR = fillfactor

|WITH ( <index_option> [ , ...n ] )

]

[ ON { partition_scheme_name (partition_column_name)

| filegroup | "default" } ]

| FOREIGN KEY

( column [ ,...n ] )

REFERENCES referenced_table_name [ ( ref_column [ ,...n ] ) ]

[ ON DELETE { NO ACTION | CASCADE | SET NULL | SET DEFAULT } ]

[ ON UPDATE { NO ACTION | CASCADE | SET NULL | SET DEFAULT } ]

[ NOT FOR REPLICATION ]

| CHECK [ NOT FOR REPLICATION ] ( logical_expression )

}

<index_option> ::=

{

PAD_INDEX = { ON | OFF }

| FILLFACTOR = fillfactor

| IGNORE_DUP_KEY = { ON | OFF }

| STATISTICS_NORECOMPUTE = { ON | OFF }

| ALLOW_ROW_LOCKS = { ON | OFF}

| ALLOW_PAGE_LOCKS ={ ON | OFF}

}