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QUERY: CREATE TABLE CHAR2_TBL(f1 char2);
QUERY: INSERT INTO CHAR2_TBL (f1) VALUES ('AB');
QUERY: INSERT INTO CHAR2_TBL (f1) VALUES ('ab');
QUERY: INSERT INTO CHAR2_TBL (f1) VALUES ('ZY');
QUERY: INSERT INTO CHAR2_TBL (f1) VALUES ('34');
QUERY: INSERT INTO CHAR2_TBL (f1) VALUES ('d');
QUERY: INSERT INTO CHAR2_TBL (f1) VALUES ('');
QUERY: INSERT INTO CHAR2_TBL (f1) VALUES ('12345');
QUERY: SELECT '' AS seven, CHAR2_TBL.*;
seven|f1
-----+--
|AB
|ab
|ZY
|34
|d
|
|12
(7 rows)
QUERY: SELECT '' AS six, c.f1 FROM CHAR2_TBL c WHERE c.f1 <> 'AB';
six|f1
---+--
|ab
|ZY
|34
|d
|
|12
(6 rows)
QUERY: SELECT '' AS one, c.f1 FROM CHAR2_TBL c WHERE c.f1 = 'AB';
one|f1
---+--
|AB
(1 row)
QUERY: SELECT '' AS three, c.f1 FROM CHAR2_TBL c WHERE c.f1 < 'AB';
three|f1
-----+--
|34
|
|12
(3 rows)
QUERY: SELECT '' AS four, c.f1 FROM CHAR2_TBL c WHERE c.f1 <= 'AB';
four|f1
----+--
|AB
|34
|
|12
(4 rows)
QUERY: SELECT '' AS three, c.f1 FROM CHAR2_TBL c WHERE c.f1 > 'AB';
three|f1
-----+--
|ab
|ZY
|d
(3 rows)
QUERY: SELECT '' AS four, c.f1 FROM CHAR2_TBL c WHERE c.f1 >= 'AB';
four|f1
----+--
|AB
|ab
|ZY
|d
(4 rows)
QUERY: SELECT '' AS seven, c.f1 FROM CHAR2_TBL c WHERE c.f1 ~ '.*';
seven|f1
-----+--
|AB
|ab
|ZY
|34
|d
|
|12
(7 rows)
QUERY: SELECT '' AS zero, c.f1 FROM CHAR2_TBL c WHERE c.f1 !~ '.*';
zero|f1
----+--
(0 rows)
QUERY: SELECT '' AS one, c.f1 FROM CHAR2_TBL c WHERE c.f1 ~ '34';
one|f1
---+--
|34
(1 row)
QUERY: SELECT '' AS one, c.f1 FROM CHAR2_TBL c WHERE c.f1 ~ '3.*';
one|f1
---+--
|34
(1 row)
|
