What is trigger and how to use it in sql?

0 Answers  

---

What are the return values of functions SQLCODE and SQLERRM ?

2 Answers   PreVator,

---

What is not equal in sql?

0 Answers  

---

what is mean by forward declaration and where we'll use it.

4 Answers   TCS,

---

Why primary key is required?

0 Answers  

---

---

Can two tables have same primary key?

0 Answers  

---

explain primary keys and auto increment fields in mysql : sql dba

0 Answers  

---

What is cursor status?

0 Answers  

---

What jobs use sql?

0 Answers  

---

How do sql databases work?

0 Answers  

---

1 SELECT a.field1, b.field2, c.field3, d.field4 2 FROM atable a, atable b, ctable c, dtable d 3 ? 4 ORDER BY 1 What is the minimum number of joins that must be specified on line 3 in the sample code above to properly link the tables? Notice that the table "atable" is aliased twice: once as "a" and once as "b." 1. One join 2. Two joins 3. Three joins 4. Four joins 5. Five joins

6 Answers   Sonata,

---

Differentiate pl/sql and sql?

0 Answers  

---