How to write a single statement that concatenates the words ?hello? And ?world? And assign it in a variable named greeting?

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How do I remove sql developer from windows 10?

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Can we rename a column in the output of sql query?

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What is pl/sql table? Why it is used?

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explain advantages of innodb over myisam. : Sql dba

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Why is the cursor important?

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how many groups of data types? : Sql dba

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Does pl sql work in mysql?

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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 global variable in package

3 Answers   Polaris,

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What is nosql db?

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What is referential integrity ?

3 Answers   BirlaSoft,

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