CREATE TABLE `t_student` ( `no` int(11) NOT NULL AUTO_INCREMENT, `name` varchar(255) CHARACTER SET utf8 DEFAULT NULL, `cno` int(11) DEFAULT NULL, PRIMARY KEY (`no`), KEY `cno` (`cno`), CONSTRAINT `t_student_ibfk_1` FOREIGN KEY (`cno`) REFERENCES `t_class` (`classno`) )...
CREATE TABLE Mannequins ( mannequin_id NUMBER PRIMARY KEY, mannequin_type VARCHAR2(10), mannequin_detail VARCHAR2(50) ); The above command creates a table with three columns: The “mannequin_id” is a unique primary key column with the data type “NUMBER” and cannot store NULL values. The...
In a CREATE TABLE statement, CLUSTERED can be specified for only one constraint. If CLUSTERED is specified for a UNIQUE constraint and a PRIMARY KEY constraint is also specified, the PRIMARY KEY defaults to NONCLUSTERED. FOREIGN KEY REFERENCES Is a constraint that provides referential integrity for...
CREATE TABLE - Creating a table from a query CREATE EXTERNAL TABLE ALTER TABLE ALTER TABLE - Adding and removing vertical partition buckets TRUNCATE TABLE DROP TABLE U-SQL indexes U-SQL statistics U-SQL views U-SQL functions U-SQL packages ...
{ 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_colu...
13.1.17.3 Using FOREIGN KEY Constraints 13.1.17.4 Silent Column Specification Changes CREATE [TEMPORARY] TABLE [IF NOT EXISTS] tbl_name (create_definition,...) [table_options] [partition_options] CREATE [TEMPORARY] TABLE [IF NOT EXISTS] tbl_name ...
CREATE TABLE 语句 CREATE TABLE 语句定义表。 该定义必须包含表的名称及其列的名称和属性。 该定义可以包含表的其他属性,例如,其主键或检查约束。 要创建已创建的临时表,请使用 CREATE GLOBAL TEMPORARY TABLE 语句。 要声明已声明的临时表,请使用 DECLARE GLOBAL TEMPORARY TABLE 语句。
We would like to create a table namedstudentthat contains a foreign key that refers to theidcolumn in the tablecity. Solution 1: Creating new table with single-column foreign key CREATETABLEstudent ( idINTPRIMARYKEY, first_nameVARCHAR(100)NOTNULL, ...
[, ... ] ) index_parameters | PRIMARY KEY ( column_name [, ... ] ) index_parameters | EXCLUDE [ USING index_method ] ( exclude_element WITH operator [, ... ] ) index_parameters [ WHERE ( predicate ) ] | FOREIGN KEY ( column_name [, ... ] ) REFERENCES reftable [ ( ref...
For more information, see Create Primary Keys. To create foreign key relationships, check constraints, or indexes, right-click in the Table Designer pane and select an object from the list as shown in the following illustration: For more information about these objects, see Create Foreign Key ...