What is pessimistic concurrency control? : Transact sql

0 Answers  

---

Why do we need a foreign key?

0 Answers  

---

what is self join and why is it required? : Sql dba

1 Answers  

---

what is bdb (berkeleydb)? : Sql dba

0 Answers  

---

What does data normalization mean?

0 Answers  

---

---

i have a table like this. i want to output like this c1 c2 c1 c2 1 10 1 10 2 20 2 30 3 30 3 60 4 40 4 100 5 5 5 105 c1 and c2 are columns in a table .i want output like this c2 values are 10,10+20,10+20+30,10+20+30+40.10+20+30+40+5. write a sql query.pls help this i want urgent.

2 Answers   IBM, Loginworks, OFSS,

---

how is exception handling handled in mysql? : Sql dba

0 Answers  

---

How to rename a table?

0 Answers  

---

What is the purpose of the primary key?

0 Answers  

---

What is sql and also describe types of sql statements?

0 Answers  

---

Can we use two order by clause in query?

0 Answers  

---

How many types of keys are there in sql?

0 Answers  

---