The SQL INSERT statement is most commonly used to insert individual rows into a table.
But you can also insert the results of a query into a table. This means that you can insert multiple rows at once (as long as they’re returned by the query).
Continue readingSQL Server has the UPDATE() function that you can use within your DML triggers to check whether or not a specific column has been updated.
While this function only accepts one column, there’s nothing to stop you from including multiple UPDATE() clauses with AND or OR to test for multiple column updates.
In SQL Server, you can query the sys.partitions system catalog view to find out whether or not a partition has been compressed.
In particular, the data_compression column tells you whether it’s compressed or not. The data_compression_desc column tells you what type of compression it uses. If it isn’t compressed, it returns NONE.
SQL Server error 120 occurs when you don’t specify enough columns in your INSERT list when using a SELECT list for the values to insert.
To be more specific, it happens when you use a SELECT list in your INSERT statement, but the SELECT list doesn’t return as many columns as you’re specifying with the INSERT.
This is easy to fix. Simply make sure the number of columns match between your INSERT and SELECT list.
A SQL join is where you run a query that joins multiple tables.
This SQL joins tutorial presents basic examples of SQL joins, as well as an introduction to the various join types.
Continue readingThis article contains examples of basic SQL queries that beginners can use to retrieve data from their databases.
Continue readingThis article contains basic SQL DELETE statements that beginners can use to delete data from their database tables.
This article contains basic SQL UPDATE statements that beginners can use to update data in their database tables.
When you create a partitioned table in SQL Server, you specify which values go into each partition.
This is done when you create the partition function. When you create the partition function, you specify boundary values, which determine which values go into each partition.
Once you’ve created your partitioned table, and you’ve inserted data, you can run a normal SELECT statement to return data, just as you would with a non-partitioned table (actually, even non-partitioned tables have one partition).
But did you know that you can also specify which partition you want data from?
You can do this with the help of the $PARTITION system function in your WHERE clause.
In SQL Server, you can use the following query to determine the partitioning column for a partitioned table.
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