Which language is used in sql?

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What is sqlcontext?

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Is left join same as inner join?

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Explain the insert into statements in sql?

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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 a database lock ? : Sql dba

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what is a composite key ? : Sql dba

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Why do we create views in sql?

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Why do we need unique key in a table?

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Does a join table need a primary key?

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Which version of sql do I have?

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What is numeric function sql?

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