what is an associative array with example?

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Mention what pl/sql package consists of?

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What is union and union all keyword in sql and what are their differences?

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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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Can we use ddl commands in pl sql?

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what are the advantages a stored procedure? : Sql dba

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What is the basic form of sql query?

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Is left join same as join?

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What is the use of procedures?

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How do you declare a variable in pl sql?

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What is sql partition function?

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How delete all data from all tables in sql?

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