What is a primary key, and how is it different from a unique key?

3 Answers  

---

what is purge command explain about oracle performance tuning

2 Answers   Accenture, eCentric Solutions,

---

Which software is used for pl sql programming?

0 Answers  

---

Why is there a need for sqlcode and sqlerrm variables?

0 Answers  

---

i have a column which may contain this kind of value: 123*67_80,12*8889_5,34*8_874 ,12*7_7 (can contain space before a comma, and this string length can be anything) now i want to split this value into two column like: column1: 123*67,12*8889,34*8,12*7 column2: 80,5,874,7 use function for this

0 Answers  

---

Write a unique difference between a function and a stored procedure.

0 Answers  

---

How does a self join work?

0 Answers  

---

What is number function in sql?

0 Answers  

---

how to enter numeric values as hex numbers? : Sql dba

0 Answers  

---

what does the t-sql command ident_current does? : Transact sql

0 Answers  

---

What is the difference between nvl function, ifnull function, and isnull function?

0 Answers  

---

Which sql most popular?

0 Answers  

---