QUERY: SELECT 1 AS two UNION SELECT 2;
two
---
  1
  2
(2 rows)

QUERY: SELECT 1 AS one UNION SELECT 1;
one
---
  1
(1 row)

QUERY: SELECT 1 AS two UNION ALL SELECT 2;
two
---
  1
  2
(2 rows)

QUERY: SELECT 1 AS two UNION ALL SELECT 1;
two
---
  1
  1
(2 rows)

QUERY: SELECT 1 AS three UNION SELECT 2 UNION SELECT 3;
three
-----
    1
    2
    3
(3 rows)

QUERY: SELECT 1 AS two UNION SELECT 2 UNION SELECT 2;
two
---
  1
  2
(2 rows)

QUERY: SELECT 1 AS three UNION SELECT 2 UNION ALL SELECT 2;
three
-----
    1
    2
    2
(3 rows)

QUERY: SELECT 1.1 AS two UNION SELECT 2.2;
two
---
1.1
2.2
(2 rows)

QUERY: SELECT 1.1 AS two UNION SELECT 2;
two
---
1.1
  2
(2 rows)

QUERY: SELECT 1 AS two UNION SELECT 2.2;
two
---
  1
  2
(2 rows)

QUERY: SELECT 1 AS one UNION SELECT 1.1;
one
---
  1
(1 row)

QUERY: SELECT 1.1 AS two UNION ALL SELECT 2;
two
---
1.1
  2
(2 rows)

QUERY: SELECT 1 AS two UNION ALL SELECT 1;
two
---
  1
  1
(2 rows)

QUERY: SELECT 1 AS three UNION SELECT 2 UNION SELECT 3;
three
-----
    1
    2
    3
(3 rows)

QUERY: SELECT 1 AS two UNION SELECT 2 UNION SELECT 2;
two
---
  1
  2
(2 rows)

QUERY: SELECT 1 AS three UNION SELECT 2 UNION ALL SELECT 2;
three
-----
    1
    2
    2
(3 rows)

QUERY: SELECT f1 AS five FROM FLOAT8_TBL
UNION
SELECT f1 FROM FLOAT8_TBL;
five                 
---------------------
-1.2345678901234e+200
-1004.3              
-34.84               
-1.2345678901234e-200
0                    
(5 rows)

QUERY: SELECT f1 AS ten FROM FLOAT8_TBL
UNION ALL
SELECT f1 FROM FLOAT8_TBL;
ten                  
---------------------
0                    
-34.84               
-1004.3              
-1.2345678901234e+200
-1.2345678901234e-200
0                    
-34.84               
-1004.3              
-1.2345678901234e+200
-1.2345678901234e-200
(10 rows)

QUERY: SELECT f1 AS nine FROM FLOAT8_TBL
UNION
SELECT f1 FROM INT4_TBL;
nine                 
---------------------
-1.2345678901234e+200
-2147483647          
-123456              
-1004.3              
-34.84               
-1.2345678901234e-200
0                    
123456               
2147483647           
(9 rows)

QUERY: SELECT f1 AS ten FROM FLOAT8_TBL
UNION ALL
SELECT f1 FROM INT4_TBL;
ten                  
---------------------
0                    
-34.84               
-1004.3              
-1.2345678901234e+200
-1.2345678901234e-200
0                    
123456               
-123456              
2147483647           
-2147483647          
(10 rows)

QUERY: SELECT f1 AS five FROM FLOAT8_TBL
  WHERE f1 BETWEEN -1e6 AND 1e6
UNION
SELECT f1 FROM INT4_TBL
  WHERE f1 BETWEEN 0 AND 1000000;
                 five
---------------------
              -1004.3
               -34.84
-1.2345678901234e-200
                    0
               123456
(5 rows)

QUERY: SELECT f1 AS five FROM VARCHAR_TBL
UNION
SELECT f1 FROM CHAR_TBL;
five
----
a   
a   
ab  
ab  
abcd
(5 rows)

QUERY: SELECT f1 AS three FROM VARCHAR_TBL
UNION
SELECT TRIM(TRAILING FROM f1) FROM CHAR_TBL;
three
-----
a    
ab   
abcd 
(3 rows)

QUERY: SELECT f1 AS eight FROM VARCHAR_TBL
UNION ALL
SELECT f1 FROM CHAR_TBL;
eight
-----
a    
ab   
abcd 
abcd 
a    
ab   
abcd 
abcd 
(8 rows)

QUERY: SELECT f1 AS five FROM TEXT_TBL
UNION
SELECT f1 FROM VARCHAR_TBL
UNION
SELECT TRIM(TRAILING FROM f1) FROM CHAR_TBL;
five             
-----------------
a                
ab               
abcd             
doh!             
hi de ho neighbor
(5 rows)

