What do you mean by “trigger” in sql?

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how to enter binary numbers in sql statements? : Sql dba

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How delete all records from table in sql?

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Can I create table without primary key?

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SELECT emp_num, years, SUM(salary) FROM sales UNION ALL SELECT emp_id, SUM(takehomepay) FROM marketing What error is present in the sample code above? 1. Queries being combined with the UNION ALL statement are not allowed to have SELECT lists with a different number of expressions. 2. You are not allowed to use aggregate functions within two queries joined by a UNION ALL statement. 3. The UNION ALL statement incorrectly combines the "years" result from the first query with the "SUM (takehomepay)" result from the second query. 4. Unless the UNION ALL statement is replaced with a UNION statement, the queries will return duplicates. 5. The "emp_id" column from the second query must be renamed (or aliased) as "emp_num" so that it corresponds to the column name from the first query. Otherwise, the queries will not execute.

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What is the difference between partition and index?

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Is sql better than access?

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i have doubt that any one tell ref cursor comes in sql pl/sql? pls clarify?

4 Answers   Tech Mahindra,

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What is execute immediate?

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Define a temp table?

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Mention what is the plv (pl/vision) package offers?

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What is use of package in pl sql?

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