Answer / prativa mishra

Because It checks the value is not null or null.

i have doubt that any one tell ref cursor comes in sql pl/sql? pls clarify?

4 Answers   Tech Mahindra,

---

what is meant by forward declaration in functions?

4 Answers   TCS,

---

How do I find duplicates in a single column in sql?

1 Answers  

---

Enlist the data types that can be used in pl/sql?

1 Answers  

---

Is primary key a clustered index?

1 Answers  

---

What is the command used to fetch the first 5 characters of a string?

1 Answers  

---

What is a mutating table and a constraining table?

1 Answers  

---

Why select is used in sql?

1 Answers  

---

Explain autonomous transaction.

1 Answers  

---

i declare 4 procedure in package specification but in package body i write only 3 procedure. is it complie??//w

4 Answers   Scope International,

---

How to get list of all tables from a database?

1 Answers  

---

Maximum how many triggers can we use in trigger and How to find out how many records it fetched.

1 Answers   TCS,

---