How do I count records in sql?

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Which sql most popular?

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What is a table partition?

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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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What is a sql schema used for?

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how to find the second highest salary from emp table?

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what is acid property in database? : Sql dba

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Can we use distinct and group by together?

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If an unique key constraint on DATE column is created, will it validate the rows that are inserted with SYSDATE?

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What is sqlcontext?

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what are the disadvantages of mysql? : Sql dba

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What is trigger and how to use it in sql?

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