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BIT_XOR

Performs an XOR function on corresponding pairs of bits (i.e., the first pair of bits, the second pair of bits, etc.).

Since BIT_XOR is an aggregate function, it can be used with the GROUP BY clause.

May be used as a window function.

Syntax

Aggregate Function

BIT_XOR  (<expr1>, <expr2>)

Window Function

BIT_XOR(col | expr) OVER (
    [PARTITION BY (col | expr), ...] 
    [ORDER BY (col | expr), ...]

Arguments

  • expression: expressions must be integer data types.

Return Type

This will result in a one if two of the corresponding bits are different.  If the bits are the same it will return a zero.

Examples

Aggregate Function

CREATE TABLE numeric_sample (group_name varchar(10), ltr_val int);
INSERT INTO numeric_sample VALUES
  ('alpha', 111), ('beta', 110), ('gamma', 000), ('delta', 001);

SELECT group_name, BIT_XOR(001) FROM numeric_sample GROUP BY group_name;
+-------------------------+
|group_name | BIT_AND(001)|
+-------------------------+
|alpha      | 1           |
+-----------|-------------+
|beta       | 1           |
+-----------|-------------+
|delta      | 1           |
+-----------|-------------+
|gamma      | 1           |
+-----------+-------------+

Window Function

CREATE TABLE player_scores(player_name VARCHAR(50), player_id VARCHAR(10), 
    1st_qtr_score DECIMAL(5,2), 2nd_qtr_score DECIMAL(5,2), 
    3rd_qtr_score DECIMAL(5,2), 4th_qtr_score DECIMAL(5,2), 
    yearly_total AS 1st_qtr_score + 2nd_qtr_score + 3rd_qtr_score + 4th_qtr_score PERSISTED DECIMAL(5,2));

INSERT INTO player_scores VALUES
    ('Steve', '119','22.50','72.00', '63.00', '45.00'),
    ('Jack', '432', '90.10', '78.00','88.20', '92.20'),
    ('Jim', '779','75.00', '68.90','55.70', '72.00'), 
    ('Eve', '189','91.50', '88.10', '95.00', '94.50'),
    ('Shelia','338', '75.60', '72.00', '81.10', '78.40'),
    ('June', '521', '81.00', '87.30','76.80','82.20'),
    ('Martin', '674','98.80', '95.10', '88.00', '96.40')
SELECT player_name, 1st_qtr_score, 2nd_qtr_score,
bit_xor(3rd_qtr_score) OVER (ORDER BY 2nd_qtr_score)
FROM player_scores
ORDER BY player_name;

****
+-------------+---------------+---------------+-----------------------------+
| player_name | 1st_qtr_score | 2nd_qtr_score | bit_xor(3rd_qtr_score) OVER |
|             |               |               |(ORDER BY 2nd_qtr_score)     |                           
+-------------+---------------+---------------+-----------------------------+
| Eve         |         91.50 |         88.10 |                          28 |
| Jack        |         90.10 |         78.00 |                          14 |
| Jim         |         75.00 |         68.90 |                          56 |
| June        |         81.00 |         87.30 |                          67 |
| Martin      |         98.80 |         95.10 |                          68 |
| Shelia      |         75.60 |         72.00 |                          86 |
| Steve       |         22.50 |         72.00 |                          86 |
+-------------+---------------+---------------+-----------------------------+