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To convert a varchar to a number in Oracle, you can use the TO_NUMBER function. This function converts a character string into a number. The syntax for the TO_NUMBER function is: TO_NUMBER(input_string, format_mask) where input_string is the varchar that you want to convert to a number and format_mask specifies the format of the input_string. The format_mask is optional and can be used to control the conversion process. If you do not provide a format_mask, Oracle will use the default format.
For example, if you have a varchar column named "numeric_string" in a table and you want to convert it to a number, you can use the following SQL query: SELECT TO_NUMBER(numeric_string) FROM your_table;
Note that if the varchar string contains characters that are not numeric, the conversion will fail. Make sure that the input_string contains only numeric characters before using the TO_NUMBER function.
How to convert a comma-separated number to a number in Oracle?
You can use the TO_NUMBER function in Oracle to convert a comma-separated number to a number. Here's an example:
SELECT TO_NUMBER('1,234.56', '999,999.99') FROM dual;
In this example, '1,234.56' is the comma-separated number that you want to convert to a number. The '999,999.99' format mask specifies the format of the number. This function will strip out the commas and convert the string to a number.
Alternatively, you can also use the REPLACE function to remove the commas before converting the string to a number:
SELECT TO_NUMBER(REPLACE('1,234.56', ',', '')) FROM dual;
What is the data type of the output when converting varchar to number in Oracle?
When converting a VARCHAR to a number in Oracle, the output data type will be a NUMBER data type.
How to convert a varchar representing a date to a number in Oracle?
To convert a varchar representing a date to a number in Oracle, you can use the TO_DATE function to convert the varchar to a date format, and then use the TO_NUMBER function to convert the date to a number format.
Here is an example:
SELECT TO_NUMBER(TO_CHAR(TO_DATE('2022-01-01', 'YYYY-MM-DD'), 'YYYYMMDD')) AS converted_date_number FROM dual;
In this example, '2022-01-01' is the varchar representing the date. The TO_DATE function converts this varchar to a date format, and the TO_CHAR function formats the date as 'YYYYMMDD'. Finally, the TO_NUMBER function converts the date in 'YYYYMMDD' format to a number.
You can adjust the date format in the TO_DATE and TO_CHAR functions as needed based on the format of your varchar representing the date.