What is trigger price?

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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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Explain what is sql*plus?

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How to get the procedure's, function's name from a package if it is wrapped(both spec & body).

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Why truncate is used in sql?

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What is a left inner join?

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Which is faster joins or subqueries?

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What is join view in sql?

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Difference between SUBSTR and INSTR?

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What are different joins used in sql?

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What is exception? What are the types of exceptions?

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how many triggers are allowed in mysql table? : Sql dba

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