BIT_AND

Declaration

BIT_AND(expr)

Description

Returns the bitwise AND of all bits in expr.

The result type depends on whether the function parameters are evaluated as binary strings or numbers. When the parameter value is a binary string and is not a hexadecimal literal, bit literal, or NULL literal, binary string evaluation occurs. Otherwise, numeric calculation occurs, and the parameter value is converted to an unsigned 64-bit integer if necessary.

If no rows match, BIT_AND() returns a neutral value with the same length as the parameter value (all bits set to 1).

Unless all values are NULL, NULL values do not affect the result. In this case, the result is a neutral value with the same length as the parameter value.

Examples

CREATE TABLE product_information(supplier_id INT, product_id INT,list_price numeric, min_price numeric);
INSERT INTO PRODUCT_INFORMATION VALUES ('102050', '1659', '45', NULL);
INSERT INTO PRODUCT_INFORMATION VALUES ('102050', '1770', NULL, '70');
INSERT INTO PRODUCT_INFORMATION VALUES ('102050', '2370', '305', '247');
INSERT INTO PRODUCT_INFORMATION VALUES ('102050', '2380', '750', '731');
INSERT INTO PRODUCT_INFORMATION VALUES ('102050', '3255', NULL, NULL);
INSERT INTO PRODUCT_INFORMATION VALUES ('102050', '1659', '35', NULL);

SELECT * FROM product_information;
+-------------+------------+------------+-----------+
| supplier_id | product_id | list_price | min_price |
+-------------+------------+------------+-----------+
|      102050 |       1659 |         45 |      NULL |
|      102050 |       1770 |       NULL |        70 |
|      102050 |       2370 |        305 |       247 |
|      102050 |       2380 |        750 |       731 |
|      102050 |       3255 |       NULL |      NULL |
|      102050 |       2380 |        750 |       731 |
|      102050 |       1659 |         35 |      NULL |
+-------------+------------+------------+-----------+
7 rows in set (0.003 sec)

SELECT product_id, BIT_AND(list_price) BITS FROM product_information GROUP BY product_id;
+------------+----------------------+
| product_id | BITS                 |
+------------+----------------------+
|       1659 |                   33 |
|       1770 | 18446744073709551615 |
|       2370 |                  305 |
|       2380 |                  750 |
|       3255 | 18446744073709551615 |
+------------+----------------------+
5 rows in set (0.002 sec)