Answer / surya

Many of these wait events are tied to the internal implementation of Oracle and therefore are subject to change or deletion without notice. Application developers should be aware of this and write their code to tolerate missing or extra wait events.

The following SQL statement displays an alphabetical list of all Oracle wait events and the wait class to which they belong:

SQL> SELECT name, wait_class FROM V$EVENT_NAME ORDER BY name;

Difference between inline query and stored procedure?

4 Answers   Bharat, Microsoft,

---

List out the acid properties and explain?

0 Answers  

---

how will u find statistics of a database objects?

2 Answers   iFlex,

---

Explain what is table in a database?

0 Answers  

---

Is crud a cuss word?

0 Answers  

---

---

Is sql microsoft?

0 Answers  

---

Which is faster view or stored procedure?

0 Answers  

---

How many aggregate functions are available there in sql?

0 Answers  

---

What is count * in sql?

0 Answers  

---

Write a procedure to return the month and the number of developers joined in each month (cursor )

2 Answers   Tech Mahindra,

---

Give the structure of the function ?

2 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  

---