How to come back in normal stage in Mutating Table if mutating table is locked or update data?

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is mysql query is case sensitive? : Sql dba

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What is difference between joins and union?

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How can one get sql*loader to commit only at the end of the load file? : aql loader

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What are pl/sql cursors?

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How many types of tables are there?

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What do you mean by field in sql?

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What is normalisation in sql?

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What are the usage of SAVEPOINTS?

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How much ram can sql express use?

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What are the dml statements?

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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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