Can we use more than one null value for unique key?
Answers were Sorted based on User's Feedback
Answer / pavani
No, we can't use more than one null value for unique key.
Unique means it doesn't accept duplicate values.
| Is This Answer Correct ? | 41 Yes | 67 No |
What is difference between rank () row_number () and dense_rank () in sql?
Does view contain data?
Is sql sequential or random?
What is mutating error in pl sql?
how do you login to mysql using unix shell? : Sql dba
A table has 150 records. How do you retrieve 100th row to 120th row from that table ?
table name :Tab fields name 1.trx_no (pk) 2.trx_date 3.account code (7 char) 4.account type (1 char) 5.amt Tab contains account code day wise debit and credit transaction , account type fiels can have 2 value D for debit and c for Credit . write a query to display the account code wise total debit and credit bal for the month of april 2004. write a query to display account code wise new amt credit for the april 2004
What is sql engine in oracle?
How do you add a column to a table?
define sql
What is substitution variable in pl sql?
what are dynamic queries in t-sql? : Transact sql
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)