I want help with functions in MYSQL for error handling Write a stored function totalRaceTime that, given a racing number, the name of a race, and the date of a race, returns the total race time for the car spe
Just like in most databases, in PostgreSQL a trigger is a way to automatically respond to events. Maybe you want to run a function if data is inserted into a table. Maybe you want to audit the deletion of data, or simply respond to some UPDATE statement. That is exactly what a trigger...
“How to write a complex SELECT query?” -> Now we’re really close to complete our query and get really close to this answer. So, the result contains all countries with their number of calls and the average call duration. From this result, we’re interested only in these having avera...
1. Determine what version of SQL Server you have and double-click the link below to download the zip file of SQL templates. In the zip file, click on the TRACETMPL folder and double-click on the .tdf file for your version and SQL Profiler will aut...
You’ll also see that these anti-patterns stem from performance concerns and that, besides the “manual” approach to improving SQL queries, you can analyze your queries also in a more structured, in-depth way by making use of some other tools that help you to see the query plan; And, ...
Introduction to Window functions Window functions operate on a set of rows and return a single aggregated value for each row. The term Window describes the set of rows in the database on which the function will operate. We define the Window (set of rows on which functions operates) using ...
How to write a sql query to remove non-printable characters in a column but keeping the carriage return? How to write a trigger to update uniqueidentifier field? How to write EXEC in select statement How to write If-Else Condition inside cursor How to write query to access multiple databases...
For more information about the failover cluster rolling update process, see the related article in the Microsoft Knowledge Base. For more information about how to upgrade, see Version and Edition Upgrades and Upgrading to SQL Server 2008 R2. For more information about how to install a stand-alo...
I want to create a sql server procedure who subtract two columns and give its result to the last new added column.Suppose i have two currency fields in columns as 'bill','payment'.No...
AVG is one of the SQL functions known as an aggregate function. Many of the queries that we write in SQL only operate on a single row. Aggregate functions, which are also called group functions, operate on a group of rows and generate a calculated value based on the values in those rows...