Julian day the number of days since midnight on NovemBC Name of day in all lowercase, padded with blanks to length of 9 charactersĭay of week (1-7, where 1=Sunday, 7=Saturday)ĭay of week based on ISO year (1-7, where 1=Monday, 7=Sunday) Name of day capitalized, padded with blanks to length of 9 characters Name of day in all uppercase, padded with blanks to length of 9 characters Week of year (01-53) based on the ISO standard Week of month (1-5) where week 1 starts on the first day of the month Week of year (1-53) where week 1 starts on the first day of the year Name of month in all lowercase, padded with blanks to length of 9 characters Name of month capitalized, padded with blanks to length of 9 characters Name of month in all uppercase, padded with blanks to length of 9 characters Quarter of year (1, 2, 3, 4 JAN-MAR = 1).Ībbreviated name of month in all uppercaseĪbbreviated name of month in all lowercase With dates, the format_mask can be one of the following and can be used in many combinations. Plus/minus sign (for positive and negative numbers) With numbers, the format_mask can be one of the following and can be used in many combinations. The format_mask is different whether you are converting numbers or dates. The format that will be used to convert value to a string. In this tutorial, you have learned how to use the PostgreSQL TO_CHAR() function to convert a timestamp or a numeric value to a string.The syntax for the to_char function in PostgreSQL is: to_char( value, format_mask ) Parameters or Arguments value The number, date that will be converted to a string. Rental_id Code language: JavaScript ( javascript ) The following example converts a numeric and timestamp to a string: SELECT Result 2,017 F) Putting it all together example The following example converts an integer to a string: SELECT The following picture illustrates the output: E) Converting an integer to a string example The following example adds US dollar to the paid amounts: SELECT The result is: 22 :30 :59 Code language: CSS ( css ) D) Adding currency symbol to the amount example ) Code language: JavaScript ( javascript ) The following statement converts a timestamp literal to a string: SELECT The output is: C) Converting a timestamp literal to a string example The following example converts the payment date into a different format: SELECT Here is the result: B) Converting an entire timestamp value into a different format example Payment_date Code language: JavaScript ( javascript ) The following statement uses the TO_CHAR() function to format the payment date that consists of hours, minutes, and seconds: SELECT A) Converting a timestamp to a string example We will use the payment table in the sample database for the demonstration. The TO_CHAR() function returns a string in TEXT data type that represents the first argument formatted according to the specified format. Month in lowercase Roman numerals (i-xii > Month in upper case Roman numerals (I-XII > Julian Day (integer days since NovemBC at midnight UTC) Week number of ISO 8601 week-numbering year (01-53 the first Thursday of the year is in week 1) Week number of year (1-53) (the first week starts on the first day of the year) Week of month (1-5) (the first week starts on the first day of the month) ISO 8601 day of the week, Monday (1) to Sunday (7) Last digit of ISO 8601 week-numbering yearĪbbreviated uppercase month name e.g., JAN, FEB, etc.Ībbreviated capitalized month name e.g, Jan, Feb, etc.Ībbreviated lowercase month name e.g., jan, feb, etc.ĭay of ISO 8601 week-numbering year (001-371 day 1 of the year is Monday of the first ISO week)ĭay of the week, Sunday (1) to Saturday (7) Last 2 digits of ISO 8601 week-numbering year Last 3 digits of ISO 8601 week-numbering year ISO 8601 week-numbering year (4 or more digits) The following table shows the valid timestamp format strings: Pattern Upper case or lower case ordinal number suffix Plus / minus sign in the specified position Plus sign in the specified position for numbers that are greater than 0. Minus sign in the specified position for numbers that are less than 0. Sign anchored to a number that uses locale Numeric value with the specified number of digitsįill mode, which suppresses padding blanks and leading zeroes. The following table illustrates the valid numeric format strings: Format The expression can be a timestamp, an interval, an integer, a double precision, or a numeric value that is converted to a string according to a specific format. The PostgreSQL TO_CHAR() function requires two arguments: 1) expression The following illustrates the syntax of the PostgreSQL TO_CHAR() function: TO_CHAR(expression, format) Arguments The PostgreSQL TO_CHAR() function converts a timestamp, an interval, an integer, a double precision, or a numeric value to a string.
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