what are the differences between char and nchar? : Sql dba

0 Answers  

---

What is dense_rank?

0 Answers  

---

Can i use Commit inside the Trigger? Suppose i use commit what will be happy (it's complied /executed/work)

6 Answers  

---

What are triggers and its uses?

0 Answers  

---

How can we store rows in PL/SQL using array?

0 Answers   MCN Solutions,

---

Which certification is best for sql?

0 Answers  

---

What are different types of statements supported by sql?

0 Answers  

---

Why we use pl sql?

0 Answers  

---

What is update query?

0 Answers  

---

Why we use join in sql?

0 Answers  

---

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.

3 Answers  

---

how to return query output in html format? : Sql dba

0 Answers  

---