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What are functional indexes in PostgreSQL 7.3.21? PostgreSQL 7.3.21 Documentation. Prev. Chapter 8. Indexes. Next. 8.5. Functional Indexes. For a functional index, an index is…
Does LEFT JOIN slow down query? The LEFT JOIN query is slower than the INNER JOIN query because it’s doing more work. But for the…
What is SQL Server deadlock graph? Looking at the deadlock Graph The resource nodes display the objects which are involved in the deadlock. Such as…
How does MySQL calculate average marks? The MySQL AVG() function is an aggregate function that allows you to calculate the average value of a set.…
How do I display ref cursor output in PL SQL Developer? Using the classic SQL*PLUS PRINT command to view the refcursor output will work in…
How do I run a query on a linked server? Right-click on the Linked Server node and choose New Linked Server. In the General tab…
How do you count unique columns? To count the number of different values that are stored in a given column, you simply need to designate…
How do I join two columns in a table? If you’d like to get data stored in tables joined by a compound key that’s a…
What are the features supported on SQL 2017 for in memory tables? SQL Server 2017 In-Memory enhancements and improvements over previous versions sp_spaceused is now…
What data types does redshift support? The following table lists the data types that you can use in Amazon Redshift tables….Topics. Data type Aliases Description…