![]() I had a similar situation, where I needed the output to be of the date data-type, and my aforementioned solution didn't work (it only works if you need it displayed as a date, not be of the date data type. However, once you convert it to a new datatype, it will convert it as a NULL, and at that point, you're ISNULL will work as you expect it to work. This is why an ISNULL on the date field, while you're working with any date data type will not treat this as a NULL, as it is technically not being stored as a NULL. Here's why this works: If you select a date which is NULL, it will show return NULL, though it is really stored as. In this case, 103 stands for British or French date format, which is dd/mm/yyyy. ![]() declare myTime as DateTime set myTime GETDATE () select myTime select DATENAME (day, myTime) + SUBSTRING (UPPER (DATENAME (month, myTime)), 0,4) Try not to use any Character / String based operations if possible when working with dates. >= CONVERT(datetime, ' 00:00:00', 120)ĪND < CONVERT(datetime, ' 00:00:00', 120) īeing explicit about types is a very good habit to get into, particularly when dealing with dates and times.I had something similar, and here's (an edited) version of what I ended up using successfully: Try this: SELECT CONVERT (datetime2, ' 09:00', 103) The convert method takes 3 arguments: The first is the target data type, the second is the expression to convert, and the third is the style. Use DATENAME and wrap the logic in a Function, not a Stored Proc. That said, there are good reasons (as Aaron points out in his answer) to use a half-open range instead of BETWEEN (I use style 120 below just for variety): SELECT COUNT(*) One of the first considerations is the actual date/time value needed. Being explicit about the data type and string style results in the following: SELECT COUNT(*) SQL Server provides a number of options you can use for formatting a date/time string in SQL queries and stored procedures either from an input file (Excel, CSV, etc.) or a date column (datetime, datetime2, smalldatetime, etc.) from a table. normally you can use script above and you can concat another field or string as you want it. 8 char on time field based on full time hh:mm:ss. The question uses strings in ODBC canonical (with milliseconds) format (style 121). Try this: concat (left (datefield,10),left (timefield,8)) 10 char on date field based on full date yyyy-MM-dd. SQL Server : - 3rd parameter specifies 112 style (Date 'YYYYMMDD' format) SELECT CONVERT (CHAR( 8), GETDATE (), 112) 20170406. In MariaDB you can use the DATEFORMAT function. When working with strings and date/time types, CONVERT is to be preferred because it provides a style parameter to explicitly define the string format. Definition and Usage The CONVERT () function converts a value (of any type) into a specified datatype. In SQL Server you can use CONVERT function to convert a DATETIME value to a string with the specified style (string format). SQL Server provides the CAST and CONVERT functions for this purpose. In my view, the neatest way to avoid these types of issues is to be explicit about types. Without explicit information about the format of the strings, SQL Server follows its convoluted rules for interpreting strings as datetimes. ![]() Don't worry about 1000, it only assures that we will have the rest of the string, not any less. substring (myDatetimeString, charindex (' ', myDatetimeString), 1000) if the day of week part may have variable length. It returns the desired result using one function and one localised style, instead of calling CONVERT twice with two generic styles and concatenating strings together, separated by a space. So all you need to do is cut out the Fri part: substring (myDatetimestring, 5, 1000) or even better. To compare those literals with the datetime column, SQL Server attempts to convert the strings to datetime types, according to the rules of data type precedence. SELECT FORMAT (yourcolumnname,'dd/MM/yyyy hh:mm:ss') FROM yourtablename. The literals you are providing for comparison to the Created column are strings. Style Description Format 0 or 100: Default: mon dd yyyy hh:miAM/PM: 1 or 101: U.S. You won't find a single SQL that works for both systems. ![]() Similar is available in SQL Server documentation. You may take adavantage from Postfres Data Type Formatting Functions with tochar (currenttimestamp, 'HH12:MI:SS'). I do not understand why the data is being converted from varchar to datetime when 'Created' is set to datetime SQL Server examples of string to datetime conversions. Both have a bunch of datetime + string functions.
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