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QUERY: CREATE TABLE CHAR4_TBL (f1 char4);
QUERY: INSERT INTO CHAR4_TBL(f1) VALUES ('ABCD');
QUERY: INSERT INTO CHAR4_TBL(f1) VALUES ('abcd');
QUERY: INSERT INTO CHAR4_TBL(f1) VALUES ('ZYWZ');
QUERY: INSERT INTO CHAR4_TBL(f1) VALUES ('343f');
QUERY: INSERT INTO CHAR4_TBL(f1) VALUES ('d34a');
QUERY: INSERT INTO CHAR4_TBL(f1) VALUES ('');
QUERY: INSERT INTO CHAR4_TBL(f1) VALUES ('12345678');
QUERY: SELECT '' AS seven, CHAR4_TBL.*;
seven|f1
-----+----
|ABCD
|abcd
|ZYWZ
|343f
|d34a
|
|1234
(7 rows)
QUERY: SELECT '' AS six, c.f1 FROM CHAR4_TBL c WHERE c.f1 <> 'ABCD';
six|f1
---+----
|abcd
|ZYWZ
|343f
|d34a
|
|1234
(6 rows)
QUERY: SELECT '' AS one, c.f1 FROM CHAR4_TBL c WHERE c.f1 = 'ABCD';
one|f1
---+----
|ABCD
(1 row)
QUERY: SELECT '' AS three, c.f1 FROM CHAR4_TBL c WHERE c.f1 < 'ABCD';
three|f1
-----+----
|343f
|
|1234
(3 rows)
QUERY: SELECT '' AS four, c.f1 FROM CHAR4_TBL c WHERE c.f1 <= 'ABCD';
four|f1
----+----
|ABCD
|343f
|
|1234
(4 rows)
QUERY: SELECT '' AS three, c.f1 FROM CHAR4_TBL c WHERE c.f1 > 'ABCD';
three|f1
-----+----
|abcd
|ZYWZ
|d34a
(3 rows)
QUERY: SELECT '' AS four, c.f1 FROM CHAR4_TBL c WHERE c.f1 >= 'ABCD';
four|f1
----+----
|ABCD
|abcd
|ZYWZ
|d34a
(4 rows)
QUERY: SELECT '' AS seven, c.f1 FROM CHAR4_TBL c WHERE c.f1 ~ '.*';
seven|f1
-----+----
|ABCD
|abcd
|ZYWZ
|343f
|d34a
|
|1234
(7 rows)
QUERY: SELECT '' AS zero, c.f1 FROM CHAR4_TBL c WHERE c.f1 !~ '.*';
zero|f1
----+--
(0 rows)
QUERY: SELECT '' AS three, c.f1 FROM CHAR4_TBL c WHERE c.f1 ~ '.*34.*';
three|f1
-----+----
|343f
|d34a
|1234
(3 rows)
|
