Often the existing data in the database needs to get updated, even if they are part of any primary or foreign keys. In Oracle8.0, it is possible to defer integrity
There are times when duplicate records somehow creep into a table despite your best efforts. This happens more in cases where data is loaded into table from other sources because
The LIKE statement is often used in SQL queries with wildcards to find data that issimilar to a matching pattern. PL/SQL has two forms of wildcard: _ and %. The
You often encounter requirements for reports to retrieve the top-n/first-n rows of a table
In a nested procedure environment, I have often felt the need to isolatethe transactions of the child/called procedure from the parent/calling procedure’s transactions. Until Oracle8i, it used to be a
Use Cascading Style Sheets to create a floating text paragraph. First, add the attribute in the document’s section: Now, add the content you want to display in the window: Visit
Checking whether a table exists in a Microsoft SQL Server database is easy. You can use this query: SELECT ‘x’FROM sysobjectsWHERE type = ‘U’ and NAME = ‘mytable’ But this
In Microsoft SQL Server, you frequently need to navigate through data row by row. This is usually done using T-SQL server-side cursors. Considering that processing overhead on cursors is higher