In a table i have columns A,B,C and i have a composite index
on columns A,B if so will the following query uses index or
not?
SELECT sal,name
FROM <table_name>
WHERE A=<value> AND B=<value> AND C=<value>;
Answers were Sorted based on User's Feedback
Answer / dinesh
Table Access (BY INDEX ROWID)
Filter predicates C=
INDEX(UNIQUE SCAN) A= B=
Here we use "AND" operator that query used index
if we used "OR" its not used Index scan
| Is This Answer Correct ? | 0 Yes | 0 No |
what is bdb (berkeleydb)? : Sql dba
Can we use more than one null value for unique key?
31 Answers A1 Technology, Wipro,
What is the use of primary key?
What does sql stand for?
How do you use collections in procedure to return the resultset?
define primary key & secondary key?
Are subqueries faster than joins?
Is time a data type in sql?
Is left join inner or outer?
How many levels can subqueries be nested in a FROM clause?
What is embedded sql what are its advantages?
how to findout the 100th maximum salary
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)