imam wardany [dot] com

The WHERE clause is a row filter that is used to restrict the output of rows (or tuples ) in a result set. When the WHERE clause is used, the SQL Server database engine selects the rows from the table for the result set that meet the conditions listed in the WHERE clause. So, as we have previously illustrated, if no WHERE clause is used in a query, the query will return all rows from the table.Following is the general syntax of a SELECT statement with a WHERE clause:

SELECT column-names
FROM   Table
WHERE  criteria

For example, consider the following query:

Related Posts
Displaying or SELECTing Rows or Tuples from a Table
In relational database terminology, a table is called a  relation, and is denoted by the name of the...
Glossary  Windows Server 2003
A 

Access Control Entries (ACEs)
Data structures that identify permissions and indicate to whom ...
Popularity: 8% [?]


	
					
										

				
Continue reading or Leave a comment... (1)
			
					
					
					
				

In relational database terminology, a table is called a relation, and is denoted by the name of the relation followed by the columns (or attributes), as shown here:

Dependent(pno, dname, relationship, sex, age)

Popularity: 8% [?]

• Continue reading or Leave a comment... (0)

MySQL also includes a set of functions that return their result based on a condition, just like the conditions you use in a WHERE clause.

TRUE and FALSE
Every condition returns a value, TRUE or FALSE, depending on whether the condition is satisfied. There is no Boolean data type in MySQL TRUE equates to 1, and FALSE equates to 0.

You can actually see these values by executing a condition as a query, as follows:

mysql> SELECT code, price, price > 10.00
-> FROM products;
+——+——-+—————+
| code | price | price > 10.00 |
+——+——-+—————+
| MINI | 5.99 | 0 |
| MIDI | 9.99 | 0 |
| MAXI | 15.99 | 1 |
+——+——-+—————+
3 rows in set (0.00 sec)

The output from this query shows each product and its price from the products table. The conditional column returns TRUE when the price is greater than 10.00.

Popularity: 8% [?]

• Continue reading or Leave a comment... (0)

Function

User Defined Function (UDF) merupakan kumpulan code Transact SQL , yang dapat memuat parameter, dan return value, atau table.
UDF Type:
- Scalar function  nilai kembaliannya berupa single value.
- In Line Table functions mengembalikan variabel dalam bentuk single table yang dibuat oleh statement SELECT.
- Multi-statement Table Function. Function ini mengembalikan variabel table yang strukturnya dibuat secara manual, mirip dengan statement untuk membuat table. Type fungsi ini digunakan untuk manipulasi data yang kompleks didalam function.

Popularity: 6% [?]

• Continue reading or Leave a comment... (0)