![]() In this tutorial, you have learned how to use the Oracle TO_CHAR() function to convert a DATE or INTERVAL value to a string in a specified format. The picture below illustrates the result: Hire_date BETWEEN DATE '' AND date '' ORDER BY The following statement uses the TO_CHAR() function to return the quarter when the employees joined the company in 2016: SELECT See the employees table in the sample database: TO_CHAR( INTERVAL '600' SECOND, 'HH24:MM') result FROMĭUAL Code language: SQL (Structured Query Language) ( sql ) This example uses the TO_CHAR() function to format an interval: SELECT The result is in French: Mercredi, Août 02, 2017Ĭode language: SQL (Structured Query Language) ( sql ) B) Format an interval example To display the names of day and month in another language e.g., French, you use the nlsparam argument as follows: SELECT Here is the result: Wednesday, August 02, 2017 To convert the current system date to a long date string, you use the DL date format as follows: SELECT The result is: Code language: SQL (Structured Query Language) ( sql ) The following statement converts the current system date to a string with the format YYYY-MM-DD: SELECT The Oracle TO_CHAR() function returns a string represented a DATE or INTERVAL value in a specified format. ![]() If you omit it, the TO_CHAR() function uses the default date language. 1 Since you are not shared the sample data of the Gradd19 value, I suspect the date value is in the yyyy-dd-mm format, so when trying to convert (month value more than 12) it cause the out-of-range value error. The nlsparam argument has the following form: 'NLS_DATE_LANGUAGE = language'Ĭode language: SQL (Structured Query Language) ( sql ) The nlsparam argument specifies the languages for names and abbreviations of day and month e.g., Monday, Mon, January, Jan, etc., in the result string. ![]() To compose value for the date_format argument, you use the Oracle date format model. If you omit it, the TO_CHAR() function will use the default date format for DATE values, default timestamp format for TIMESTAMP and TIMESTAMP WITH TIME ZONE value, and default timestamp with time zone format for TIMESTAMP WITH TIME ZONE values. The date_format is a string that determines the format that the result string should be in. The data type of expr can be DATE, TIMESTAMP, TIMESTAMP WITH TIME ZONE, or TIMESTAMP WITH LOCAL TIME ZONE. The expr is a DATE or an INTERVAL value that should be converted. The Oracle TO_CHAR() accepts three arguments: The following illustrates the syntax of the TO_CHAR() function: TO_CHAR(expr ) Ĭode language: SQL (Structured Query Language) ( sql ) Arguments The Oracle TO_CHAR() function is very useful for formatting the internal date data returned by a query in a specific date format. But based on the LEN() function you may avoid the non-valid data, then using the CONVERT you can get the VARCAHR field as DATETIME value.īased on your sample data the valid date's minimum length is 10 characters, so you can apply the condition in the WHERE clause.The Oracle TO_CHAR() function converts a DATE or INTERVAL value to a string in a specified date format. Update: As you mentioned in the comments the Gradd19 having the values of 20 and 60, it is difficult to filter those non-valid data. You need to use CONVERT(VARCHAR(19), CONVERT(DATETIME, Gradd19, 105), 120) AS ExpiryDate SELECT instead of CONVERT(VARCHAR, Gradd19, 105) AS ExpiryDate SELECT = CONVERT(VARCHAR(19), CONVERT(DATETIME, 105), 120) SELECT in that case you need do one more conversion to skip the issue, like the below: DECLARE DATETIME SELECT if it is in yyyy-dd-mm it will throw out-of-range value error DECLARE DATETIME Since you are not shared the sample data of the Gradd19 value, I suspect the date value is in the yyyy-dd-mm format, so when trying to convert (month value more than 12) it cause the out-of-range value error.įor sample, if the date format in yyyy-mm-dd, it will execute properly: DECLARE DATETIME
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