How to rename a column in the output of sql query?

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What is the difference between count 1 and count (*) in a sql query?

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i have a table t1 a math 20 b phy 30 cchemisty 10 a math 40 b phy 23 c che 21 a math15 bphy 33 c che 56 write a quire to find out the max markr of each subject

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how to connect oracle in unix prompt?

4 Answers   Polaris,

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Hi all, i have a table as follows empid empname mgrid deptid 1 a 3 4 2 b 1 5 3 c 2 3 4 d 3 6 5 e 4 7 i want the output as empname mgrname a c b a c b d c e d

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What are the two types of periodical indexes?

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What is sql engine in oracle?

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Is like operator in sql case sensitive?

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What is sql query optimization?

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Is primary key an index?

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Explain the difference between sql and mysql.

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Why do we create stored procedures & functions in pl/sql and how are they different?

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