Boolean Type

Updated on 2024-09-30 GMT+08:00

View PDF

**Table 1** Boolean type
Name	Description	Storage Space	Value
BOOLEAN	Boolean type	1 byte	true false null (unknown)

Valid literal values for the "true" state are:

TRUE, 't', 'true', 'y', 'yes', '1'

Valid literal values for the "false" state include:

FALSE, 'f', 'false', 'n', 'no', '0'

TRUE and FALSE are standard expressions, compatible with SQL statements.

Examples

Data type boolean is displayed with letters t and f.

    
     
       
       -- Create a table:
CREATE TABLE bool_type_t1  
(
    BT_COL1 BOOLEAN,
    BT_COL2 TEXT
) DISTRIBUTE BY HASH(BT_COL2);

--Insert data:
INSERT INTO bool_type_t1 VALUES (TRUE, 'sic est');

INSERT INTO bool_type_t1 VALUES (FALSE, 'non est');

-- View data:
SELECT * FROM bool_type_t1;
 bt_col1 | bt_col2 
---------+---------
 t       | sic est
 f       | non est
(2 rows)

SELECT * FROM bool_type_t1 WHERE bt_col1 = 't';
 bt_col1 | bt_col2 
---------+---------
 t       | sic est
(1 row)

-- Delete the tables:
DROP TABLE bool_type_t1;

      

    
   