We have two types of indexes in Mysql. The data in the same table stores the primary index. Whenever we create a primary or unique key in the table, it automatically creates an index with the PRIMARY. We also refer to the primary index as the clustered index. The clustered index maintain...
One thing you can’t do with the CREATE command is add a primary key. For that we’ll have to consider the other general method for adding an index to an existing table. It uses the ALTER TABLE command to ADD INDEX or ADD UNIQUE INDEX, ADD PRIMARY KEY, or ADD FULLTEXT. [code type...
In this article we will take a look at how to enable an index in SQL Server. This is a very useful feature which will help you enable an index which was disabled earlier to check whether the index was really useful or not without actually dropping the index. How to verify whether an i...
MySQL INDEX denotes the indexing process to build the indexes on a database that provides the basis for quick casual lookups and proficient ordering to fetch the rows using indexes properly using phpMyAdmin. If we see practically, Indexes hold the Primary key or Index field and a pointer to ev...
Indexes. They're one of the most powerful and misunderstood aspects of SQL performance. In this post we'll look at the purpose of an index, how to create and choose choose your index type. Then finish with a discussion of how to decide what to index and
“Unable to enlist in the transaction” with Oracle linked server from MS SQL Server [<Name of Missing Index, sysname,>] in non clustered index [Execute SQL Task] Error: The value type (__ComObject) can only be converted to variables of type Object. [ODBC Driver Manager] Data source na...
How to add value of field in sql query Subscribe Get notified when there's activity on this post This question has been flagged 2Replies 4902Views Thayif kabir i want to check the value of jobsheet field with database. When i run my code it gives syntax errors ...
So the SQL server is remote. In this case we have to add domainName\ServerName$ to SQl server database instead of AppPool1,AppPool2.If we add domainname\servername$ to a database A, does that mean all the application pool has access to database A?Thanks, Anonymous Ma...
Applies ToMicrosoft® SQL Server™ 2000 OverviewThis How To helps you to optimize your queries by indexing your tables correctly. The purpose of an index in SQL Server is to allow the server to retrieve requested data, in as few I/O operations as possible, in order to improve ...
How to: To SQL add a column with a default value is a simple operation in SQL. Let us set up a ‘student’ table as below: