Oracle® Database SQL Reference 10g Release 2 (10.2) Part Number B14200-02 |
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Syntax
Purpose
BITAND
computes an AND
operation on the bits of expr1
and expr2
, both of which must resolve to nonnegative integers, and returns an integer. This function is commonly used with the DECODE
function, as illustrated in the example that follows.
An AND
operation compares two bit values. If the values are the same, the operator returns 1. If the values are different, the operator returns 0. Only significant bits are compared. For example, an AND
operation on the integers 5 (binary 101
) and 1 (binary 001
or 1
) compares only the rightmost bit, and results in a value of 1 (binary 1
).
Both arguments can be any numeric datatype, or any nonnumeric datatype that can be implicitly converted to NUMBER
. The function returns NUMBER
.
Note:
This function does not determine the datatype of the value returned. Therefore, in SQL*Plus, you must specifyBITAND
in a wrapper, such as TO_NUMBER
, which returns a datatype.See Also:
Table 2-10, "Implicit Type Conversion Matrix" for more information on implicit conversionExamples
The following represents each order_status
in the sample table oe.orders
by individual bits. (The example specifies options that can total only 7, so rows with order_status
greater than 7 are eliminated.)
SELECT order_id, customer_id, DECODE(BITAND(order_status, 1), 1, 'Warehouse', 'PostOffice') Location, DECODE(BITAND(order_status, 2), 2, 'Ground', 'Air') Method, DECODE(BITAND(order_status, 4), 4, 'Insured', 'Certified') Receipt FROM orders WHERE order_status < 8; ORDER_ID CUSTOMER_ID LOCATION METHOD RECEIPT ---------- ----------- ---------- ------ --------- 2458 101 PostOffice Air Certified 2397 102 Warehouse Air Certified 2454 103 Warehouse Air Certified 2354 104 PostOffice Air Certified 2358 105 PostOffice Ground Certified 2381 106 Warehouse Ground Certified 2440 107 Warehouse Ground Certified 2357 108 Warehouse Air Insured 2394 109 Warehouse Air Insured 2435 144 PostOffice Ground Insured 2455 145 Warehouse Ground Insured 2356 105 Warehouse Air Insured 2360 107 PostOffice Air Insured ...