CREATE TABLE - SQL Command Article 06/18/2008 In this article Parameters Remarks Examples See Also Creates a table using the specified fields or from an array.Copy CREATE TABLE | DBF TableName1 [NAME LongTableName] [FREE] [CODEPAGE = nCodePage] ( FieldName1 FieldType [( n...
UNIQUE Creates a candidate index for the field. The candidate index tag has the same name as the field.Note Candidate indexes (created by including the UNIQUE option in CREATE TABLE or ALTER TABLE - SQL) are not the same as indexes created with the UNIQUE option in the INDEX command. An...
Here, the SQL command checks if a table namedCompaniesexists, and if not, it creates a table with specified columns. Create Table Using Another Existing Table In SQL, we can create a new table by duplicating an existing table's structure. Let's look at an example. -- create a backup t...
The other method of adding a foreign key using the CREATE TABLE command is the out of line method. CREATEtable_name(column_name data_type,...CONSTRAINTfk_tbl1_tbl2FOREIGNKEY(this_tables_column)REFERENCESother_table_name(other_column_name)); You need to start with the word CONSTRAINT, then ...
syntaxsql 复制 CREATE CLUSTERED COLUMNSTORE INDEX index_name ON [ database_name . [ schema ] . | schema . ] table_name [ORDER (column[,...n])] [WITH ( DROP_EXISTING = { ON | OFF } )] [;] CREATE [ CLUSTERED | NONCLUSTERED ] INDEX index_name ON [ database_name . [ schema...
syntaxsqlCopy -- Create a new table.CREATETABLE{database_name.schema_name.table_name|schema_name.table_name|table_name} ( {column_name<data_type>[<column_options>] } [ ,...n ] ) [WITH(<table_option>[ ,...n ] ) ] [;]<column_options>::=[COLLATEWindows_collation_name] [NULL|...
To create a table in SQL, use theCREATE TABLEcommand, followed by your desired name for the table: CREATE TABLEtable_name; Copy Be aware that, as with every SQL statement,CREATE TABLEstatements must end with a semicolon (;). This example syntax will create an empty table that doesn’t ...
Tables are created with no data unless a subquery is specified. You can add rows to a table with the INSERT statement. After creating a table, you can define additional columns, partitions, and integrity constraints with the ADD clause of the ALTER TABLE statement. You can change the definiti...
The CREATE TABLE statement defines a table. The definition must include its name and the names and attributes of its columns. The definition can include other attributes of the table, such as its primary key and its table space.
Let’s create some tables with SQL Create statement : The following simple SQL creates table Doctor with one constraint, doctor_id as a primary key: Create table doctor ( doctor_id int PRIMARY KEY, name varchar (20), age int, gender varchar (10), ...