16.20 - Example: SHOW TABLE with Column-Level Named Constraints - Teradata Database - Teradata Vantage NewSQL Engine

Teradata Vantage™ SQL Data Definition Language Syntax and Examples

Product
Teradata Database
Teradata Vantage NewSQL Engine
Release Number
16.20
Published
March 2019
Language
English (United States)
Last Update
2019-05-24
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The request in this example names constraints at the column level.

     CREATE TABLE good_1 (
       column_1 INTEGER NOT NULL CONSTRAINT primary_1 PRIMARY KEY, 
       column_2 INTEGER NOT NULL CONSTRAINT unique_1 UNIQUE, 
       column_3 INTEGER CONSTRAINT check_1 CHECK (column_3 > 0),
       column_4 INTEGER CONSTRAINT reference_1 REFERENCES parent_1);

Now perform the following SHOW TABLE request on good_1.

     SHOW TABLE good_1;

The request returns the following CREATE TABLE SQL text.

     CREATE SET TABLE personnel.good_1, NO FALLBACK,
        NO BEFORE JOURNAL, NO AFTER JOURNAL (
        column_1 INTEGER NOT NULL,
        column_2 INTEGER NOT NULL,
        column_3 INTEGER,
        column_4 INTEGER,
        CONSTRAINT check_1 CHECK ( column_3 > 0 ),
        CONSTRAINT reference_1 FOREIGN KEY ( column_4 )
           REFERENCES personnel.parent_1 ( f2 ))
     UNIQUE PRIMARY INDEX primary_1 ( column_1 )
     UNIQUE INDEX unique_1 ( column_2 );