name If that returns a NULL, chances are the database is not online or is closed due to AUTOCLOSE (which defaults to ON for SQL Server Express). name, D.collationname FROM sys.databases AS D ORDER BY D. You should post these to /r/learnsql instead. You can see the default collation for each database using: SELECT D. Note /r/SQL does not allow links to basic tutorials to be posted here. Please view the Wiki for online resources. Learning SQLĪ common question is how to learn SQL. The format used to convert between data types, such as a date or string format. The value to convert to another data type. SELECT count(a.field1), a.field2, SUM(b.field4) FROM a INNER JOIN b ON a.key1 = b.key1 WHERE a.field8 = 'test' GROUP by a.field1, a.field2 HAVING SUM(b.field4) > 5 ORDER by a.field.3įor those with SQL questions we recommend using SQLFiddle to provide a useful development and testing environment for those who wish to fully understand your problem and help devise a solution. The length of the resulting data type (for char, varchar, nchar, nvarchar, binary and varbinary) expression. Something as simple as line breaks and using reddit's built in code formatting (4 spaces at the start of each line) can turn this: This will greatly increase your chances of receiving the help you desire. ![]() If you are including actual code in a post or comment, please attempt to format it in a way that is readable for other users. We will gladly help where we can as long as you post the work you have already done or show that you have attempted to figure it out on your own. CAST('195' AS int) CONVERT(int, '225') The string to int conversion can be useful where you are taking user input and want to convert that. Both these functions are a little different to use. ![]() If you are a student or just looking for help on your code please do not just post your questions and expect the community to do all the work for you. You may use SQL CAST and CONVERT functions for converting int to string and vice versa. While naturally we should endeavor to work as platform neutrally as possible many questions and answers require tailoring to the feature set of a specific platform. When requesting help or asking questions please prefix your title with the SQL variant/platform you are using within square brackets like so: In MariaDB, transcoding names are the same as theĬorresponding character set names.The goal of /r/SQL is to provide a place for interesting and informative SQL content and discussions. ) are SQL92 syntax.ĬONVERT() with USING is used to convert data between different character sets. ![]() The main difference between the CAST() and CONVERT() is that CONVERT(expr,type) is ODBC syntax while CAST(expr as type) and CONVERT(. Values shorter than the given number in bytes are padded with 0x00 bytes to make them equal the length value.ĬHAR(N) causes the cast to use no more than the number of characters given in the argument. If the optional length is given, BINARY(N) causes the cast to use no more than N bytes of the argument. Note that in MariaDB, INT and INTEGER are the same thing.īINARY produces a string with the BINARY data type. ![]()
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