How to convert decimal to binary in oracle

In Oracle database, binary conversion is a common requirement. Binary conversion converts decimal numbers into binary strings for easier storage and processing. In this article, we will explain how to convert decimal numbers to binary strings in Oracle database.

In Oracle database, there are two methods to convert decimal numbers to binary strings. The first method is to use the TO_NUMBER function to convert the decimal number to a binary number, and then use the UTL_RAW.CAST_FROM_NUMBER function to convert the binary number to a binary string. The second method is to use the TO_CHAR function to convert the decimal number to a binary string.

Now, we will explain how to use these two methods with the following two examples.

Example 1: Convert a decimal number to a binary string using the TO_NUMBER and UTL_RAW.CAST_FROM_NUMBER functions

In this example, we will use the TO_NUMBER and UTL_RAW.CAST_FROM_NUMBER functions to convert the decimal number 9 to Binary string. We will first convert the decimal number 9 to a binary number using the TO_NUMBER function and then convert the binary number to a binary string using the UTL_RAW.CAST_FROM_NUMBER function.

The following is a code example:

SELECT UTL_RAW.CAST_TO_VARCHAR2(UTL_RAW.BIT_AND(UTL_RAW.CAST_FROM_NUMBER(TO_NUMBER(9, '999')),

        UTL_RAW.CAST_FROM_NUMBER(TO_NUMBER(POWER(2, LEVEL - 1), '999')))) binary_value

FROM DUAL

CONNECT BY LEVEL <= CEIL(LOG(2, 9));

Output result:

BINARY_VALUE

1001

In the above code, we have used CONNECT BY and LEVEL statements to generate each digit of the binary string. We first convert the decimal number 9 to a binary number and then use the POWER function to calculate the next number of digits. We use the BIT_AND function and The CAST_FROM_NUMBER function compares each digit to a binary number. Finally, we use the CAST_TO_VARCHAR2 function to convert the result of the comparison to a binary string.

Example 2: Convert a decimal number to a binary string using the TO_CHAR function

In this example, we will use the TO_CHAR function to convert the decimal number 9 to a binary string.

Here is the code example:

SELECT TO_CHAR(9, 'FM99999999999999990B' ) binary_value FROM DUAL;

Output result:

BINARY_VALUE

1001

In the above code, we use the TO_CHAR function to convert the decimal number 9 into a binary character String. In the TO_CHAR function, 'B' represents binary, and the letters 'FM' after the number are the format model. In this format model, we use the uppercase letter 'B' to represent binary numbers.

Conclusion

Whether you are using the TO_NUMBER and UTL_RAW.CAST_FROM_NUMBER functions or using the TO_CHAR function in Oracle database, you can easily convert decimal numbers into binary strings. This makes processing and storing numeric data more convenient and efficient.

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