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.
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3 Ways to Return the Time Zone from a Datetime Value in Oracle
Below are three ways to return time zone information from a datetime value in Oracle Database.
Continue readingSet the Character Set and Collation of a Column in MariaDB
You can specify the character set and collation at various levels in MariaDB. You can specify them at the connection level, the server level, the database level, the table level, and even the column level.
You can also specify a collation in your queries so that it overrides any collation that has been previously specified at the aforementioned levels.
Continue reading2 Ways to List all Functions in MySQL
Below are two options we can use to return a list of functions in MySQL.
Continue readingAbout the RM Format Element in Oracle
In Oracle Database, the RM format element allows you to return the month in roman numerals when using the TO_CHAR() function.
You can also use the fm modifier to suppress any padding.
How to Check a Column’s Data Type in SQL
In SQL, the columns information schema view, which returns information about columns, is an ISO standard view that is supported by most of the major RDBMSs. You can use this view to get information about a column’s data type.
Most of the major RDBMs also provide other methods for getting column information.
Here are examples of getting the data type of a column in various SQL databases.
Continue readingReturn Only Numeric Values in MariaDB
The following MariaDB examples return only those rows that have numeric values in a given column.
These examples use the REGEXP function to return values that match the specified pattern.
How to Remove the Zero when the Integer Part is Zero in Oracle
When using the TO_CHAR() function to format a number in Oracle Database, you can use the B format element to return blanks for the integer part of a fixed-point number when the integer part is zero.
This works regardless of zeros in the format model.
Continue reading2 Ways to Find Out Which Quarter a Date Belongs to in MariaDB
If you ever need to find out which quarter a date belongs to in MariaDB, here are two functions that will allow you to do just that.
Continue readingFix 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.