Handling Errors and Exceptions using Try-Catch: SQL

When you execute a query, it is parsed for syntactical errors before execution. If the syntax is correct, it is compiled and executed. Sometimes, due to factors, such as incorrect data, an error can occur during execution even if...

How to use Case and While statement in Batches: SQL

Database developer can use the CASE as well as While statement in situation where several conditions need to be evaluated. Using CASE statement The CASE statement evaluates a list of conditions and returns one of the possible re...

How to use Constructs in Batches for Conditional Execution: SQL

SQL Server allows you to use programming constructs in the batches for conditional execution of statements. For example, you need to retrieve data based on a condition. If the condition is not satisfied, a message should be displ...

How to Create Index using sql Query: Sql Server

Database programmer should create indexes on the most frequently queried column in a table. However, at times, you might need to create an index based on a combination of one or more columns. An index based on one or more columns...

How to Modify XML Data using Functions in SQL Server

Similar to any other type of data, programmer might also need to modify the XML data. To modify data, you can use the modify function provided by the XML data type of the SQL Server. The modify function specifies an XQuery expres...

How to Retrieve XML Data Using XQuery

In addition to FOR XML, SQL Server allows programmer to extract data stored in variables or columns with the XML data type by using XQuery. XQuery is a language that uses a set of statements and functions provided by the XML data...