Here are four methods you can use to find duplicate rows in SQL Server.
By “duplicate rows” I mean two or more rows that share exactly the same values across all columns.
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3 Ways to Return Rows that Contain Alphanumeric Characters in SQL Server
Here are three examples of returning rows that contain alphanumeric characters in SQL Server.
Alphanumeric characters are alphabetic and numeric characters.
How to Get the Recovery Model of a Database in SQL Server using T-SQL
In SQL Server, a recovery model is a database property that controls how transactions are logged, whether the transaction log requires (and allows) backing up, and what kinds of restore operations are available. Databases can use one of the following three recovery models: simple, full, and bulk-logged.
You can query the sys.databases catalog view to get a list of databases and their recovery models.
Fix Msg 241 “Conversion failed when converting date and/or time from character string” in SQL Server
If you’re getting SQL Server error Msg 241 that reads Conversion failed when converting date and/or time from character string, it’s probably because you’re trying to convert a string to a date/time value, but that particular string can’t be converted to the date/time type specified.
How NULLIF() Works in SQL Server
In SQL Server, the NULLIF() expression checks the value of two specified expressions. It returns a null value if they’re equal, otherwise it returns the first expression.
Fix Msg 529 “Explicit conversion from data type int to xml is not allowed” in SQL Server
If you’re getting SQL Server error Msg 529 that reads something like Explicit conversion from data type int to xml is not allowed, it’s probably because you’re trying to perform a data type conversion that’s not permitted.
SQL Server doesn’t allow certain conversions. If you try to perform such a conversion, you’ll get this error.
Fix Msg 8116 “Argument data type varchar is invalid for argument 1 of session_context function” in SQL Server
If you’re getting SQL Server error Msg 8116 with the message Argument data type varchar is invalid for argument 1 of session_context function, it’s because you’re passing the wrong data type to a function – in this case the SESSION_CONTEXT() function.
Fix Msg 8117 “Operand data type varchar is invalid for sum operator” in SQL Server
If you’re getting SQL Server error Msg 8117 with the message Operand data type varchar is invalid for sum operator, it’s because you’re passing the wrong data type to an operator or function.
In this case, the error indicates that we’re passing a string to the SUM() function. The SUM() function does not operate on strings. It only works on numeric types.
The same error (Msg 8117) can also occur in other contexts – it’s not limited to the SUM() function.
How to Detect if a Value Contains at Least One Number in SQL Server
Sometimes you might need to search a database table for only those rows that contain at least one number in a given column.
Strictly speaking, numbers can be represented by words and other symbols, but for the purpose of this article, “number” means “numerical digit”.
Below is an example of how to use T-SQL to find rows that contain at least one number in SQL Server.