![]() ![]() 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. ![]() 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. = N'Changing LANGUAGE back to default: ' + + N'.The Oracle TO_CHAR() function converts a DATE or INTERVAL value to a string in a specified date format. SELECT CONVERT(DATE, '', 103) AS - 103 = dd/mm/yyyy Conversion failed when converting date and/or time from character string. Select convert(date, GETDATE()+num,20) as fecha, num+1 from t where num 0) - us_english Select convert(date, GETDATE(),20) as fecha, 0 as num Insofar as my testing shows (after making them equal via using cast(GETDATE()+num as date)), the times varry with them being mostly the same (which makes sense if they are both reduced to being CONVERT anyway) or the CONVERT winning: SET STATISTICS IO, TIME ON And in fact, looking at the XML execution plan even shows the actual operation performed as being CONVERT(date,getdate(),0) !! The issue is that the CONVERT operation is being done with convert(date, GETDATE()+num,20) - a value to convert that changes per row - while the CAST operation is being done with a simple cast(GETDATE() as date) - a value to convert that is consistent across all rows and is replaced in the execution plan as a constant. The test in the accepted answer is unfairly biased in favor of the CAST operation. The two queries being compared do not do the same thing due to a simple typo that causes them to not be an apples-to-apples comparison. The (formerly) accepted answer iswas incorrect as it iswas a bad and misleading test. ![]()
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