The following example shows how to reference this key from another table; an explicit constraint name is optional. SQL Copy CONSTRAINT FK_SpecialOfferProduct_SalesOrderDetail FOREIGN KEY (ProductID, SpecialOffe
Defines the elements of a table, including the definition of columns and constraints on the table. column-definition Defines the attributes of the columns for a new Hadoop table that is not derived from another table by using the AS clause. column-name Names a column of the table that is ...
Use data from a related table to enhance the information in your query You may have cases in which a query that is based on one table gives you the information you need, but pulling data from another table would help to make the query results even clearer and more useful. Fo...
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LIKE to create an empty table based on the definition of another table, including any column attributes and indexes defined in the original table: CREATE TABLE new_tbl LIKE orig_tbl; For more information, see Section 13.1.18.3, “CREATE TABLE ... LIKE Statement”. [AS] query_expression ...
To create arelational tablein your own schema, you must have theCREATETABLEsystem privilege. To create a table in another user's schema, you must have theCREATEANYTABLEsystem privilege. Also, the owner of the schema to contain the table must have either space quota on the tablespace to cont...
Another way to create a table is to start with an empty table and assign variables to it. For example, re-create the table of patient data, but this time assign variables using dot notation. First, create an empty table, patients2, by calling table without arguments. Get patients2 = ...
The Database Engine raises an error and the delete action on the row in the parent table is rolled back. CASCADE Corresponding rows are deleted from the referencing table if that row is deleted from the parent table. SET NULL All the values that make up the foreign key are set to NULL ...
In theSpecify Filter Conditionsdialog box, in the first box , make sure that the connecting field from the secondary table (in this example,Products), is selected. Important:If the connecting fields have the same name in both tables, make sure that you select the correct one. The fields fr...
CREATE TABLE ... SELECT Statement 13.1.18.4 CREATE TABLE ... SELECT Statement You can create one table from another by adding a SELECT statement at the end of the CREATE TABLE statement: CREATE TABLE new_tbl [AS] SELECT * FROM orig_tbl; ...