What is the difference among union, minus and intersect?

0 Answers  

---

Types of joins?

4 Answers   Microsoft,

---

Explain what is sql*plus?

0 Answers  

---

What is the main difference between a UNION statement and a UNION ALL statement? 1. A UNION statement eliminates duplicate rows; a UNION ALL statement includes duplicate rows. 2. A UNION statement can be used to combine any number of queries; a UNION ALL statement can be used to combine a maximum of two queries. 3. A UNION statement can only combine queries that have parallel fields in the SELECT list; a UNION ALL statement can combine queries with differing SELECT list structures. 4. A UNION statement cannot be used with aggregate functions; a UNION ALL statement can be used with aggregate functions. 5. There is no difference between the two statements; they are interchangeable.

2 Answers   Saman Bank, Sonata,

---

Where the sql database files are stored?

0 Answers  

---

how to escape special characters in sql statements? : Sql dba

0 Answers  

---

Are sql views compiled?

1 Answers  

---

What is the non-clustered index in sql?

0 Answers  

---

Create table emp (id number(9), name varchar2(20),salary number(9,2)); The table has 100 records after table created.Now i nee to change id's Datatype is to be Varchar2(15). now Alter table emp modify(id varchar2(15),name varchar2(20), salary number(9,2)); Whether it will work or returns error? post answer with explanation.

13 Answers   Oracle, TCS,

---

What is clause?

0 Answers  

---

What language is oracle sql developer?

0 Answers  

---

Show code of a cursor for loop.

0 Answers  

---