What are indexes, and what are the different types?
Answers were Sorted based on User's Feedback
Answer / nashiinformaticssolutions
Indexes improve query performance by speeding up data retrieval.
Types of Indexes:
1. Clustered Index: Sorts and stores data physically in the table.
2. Non-clustered Index: Creates a separate structure to store pointers to the actual data.
3. Unique Index: Ensures all values in a column are unique.
4. Composite Index: Includes multiple columns in the index.
| Is This Answer Correct ? | 0 Yes | 0 No |
Answer / glibwaresoftsolutions
Indexes improve query performance by speeding up data retrieval.
Types of Indexes:
1. Clustered Index: Sorts and stores data physically in the table.
2. Non-clustered Index: Creates a separate structure to store pointers to the actual data.
3. Unique Index: Ensures all values in a column are unique.
4. Composite Index: Includes multiple columns in the index.
| Is This Answer Correct ? | 0 Yes | 0 No |
Indexes improve query performance by speeding up data retrieval.
Types of Indexes:
1. Clustered Index: Sorts and stores data physically in the table.
2. Non-clustered Index: Creates a separate structure to store pointers to the actual data.
3. Unique Index: Ensures all values in a column are unique.
4. Composite Index: Includes multiple columns in the index.
| Is This Answer Correct ? | 0 Yes | 0 No |
How can you view the errors encountered in a trigger?
How to disable a trigger name update_salary?
What is keys and its types?
What is sqlcontext?
How to fetch records from a partitioned table?
What is RAC in oracle?
Explain table and field in sql?
Explain the usage of WHERE CURRENT OF clause in cursors ?
What are string functions in sql?
What is the largest value that can be stored in a byte data field?
Is sqlexception checked or unchecked?
there are 2 variables called x and y ,x contains 1,2 and y contains 3,4 we have to swap the values from x to y and y to x with out using dummy variables and it can be done only by using a single statement ? how?
Oracle (3259)
SQL Server (4518)
MS Access (429)
MySQL (1402)
Postgre (483)
Sybase (267)
DB Architecture (141)
DB Administration (291)
DB Development (113)
SQL PLSQL (3330)
MongoDB (502)
IBM Informix (50)
Neo4j (82)
InfluxDB (0)
Apache CouchDB (44)
Firebird (5)
Database Management (1411)
Databases AllOther (288)