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Database - Interview Questions and Answers for 'Infor' - 5 question(s) found - Order By Newest | ||||
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Ans. ACID stands for Atomicity, Consistency, Isolation, Durability is a set of properties of database transactions. Atomicity means all or nothing. i.e parts of a transaction shouldn't commit if any one of them fails. Either the whole transaction should succeed or it should be complete rollback. Consistency means that any transaction should lead database from one stabe state to another. Isolation means that the execution of transaction results in a system state that would be obtained if transactions were executed serially. Durability means that when a transaction is committed it forms the permanent state of database. | ||||
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Like Discuss Correct / Improve  database  acid Asked in 7 Companies Intermediate | ||||
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Ans. When a Table Join itself , it's a Self Join. For example - we like to know the pair of department names where first dept has lesser employees than the later. Select D1.name , D2.name from Dept D1, Dept D2 where D1.employee_count < D2.employee_count | ||||
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Like Discuss Correct / Improve  sql  joins  self join  self-join  Pair of employee names with first having lesser salary than later  Pair of department names where first dept has lesser employees than the later Asked in 26 Companies basic   frequent | ||||
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Ans. Stored procedures are a batch of SQL statements along with programming constructs ( if else, loops etc ) and stored as a single program that can be called by different clients and hence reused. | ||||
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Like Discuss Correct / Improve  database  stored procedure Asked in 2 Companies basic   frequent | ||||
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Ans. Audit Tables generally stores Raw information to be reviewed in case of problems or determining impact. If Database space is an issue , and the audit information is rarely retrieved, one design could be to use compressed file system. | ||||
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Like Discuss Correct / Improve  databases   audit tables   raw transaction information storage Asked in 1 Companies | ||||
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Ans. Oracle having following types of joins these are also called 8i joins. There are: 1. Equi (or) Inner join 2. Non Equi join 3.Self join 4.Outer join Oracle also support the 9i (or) ANSI standard joins.There are: 1.Inner join 2.Left outer join 3.Right outer join 4.Full outer join 5.Natural join | ||||
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Like Discuss Correct / Improve  sql joins  sql Asked in 2 Companies | ||||