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 are the different types of dbms?
Are null values same as that of zero or a blank space?
Under what condition it is possible to have a page level lock and row lock at the same time for a query? : Transact sql
What is the difference between SQL and PLSQL
what is the difference between ereg_replace() and eregi_replace()? : Sql dba
select 1,col1,col2 from table1. output?
What are the benefits of pl sql?
cursor types? explain with example programs?
Why trigger is used in sql?
What is scalar and vector?
a table has 2 classifications 1)liabilities 2)earnings this liabitity has 2 elements with 2 input values and the earnings have 2 elements with 2 input values i wrote a query so that my input is liability savings amount1 amount2 xxxx null xxxxxx 0 xxx1 null xxxxx1 0 null yyyy 0 yyyy null yyy1 0 yyy1 my problem is --when i developed a report(d2k) with this data my o/p is liabilities,amount1,savings,amount2 xxxx xxxxxx xxx1 xxxxx1 yyyy yyyy yyy1 yyy1 how could i move this savings,savings values 2 palces up. can any body provide me witha better solution
What is pl sql block structure?
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)