20 April 2023 BASIS DATA I/2009-GENAP 1

SQL SELECT STATEMENT

BASIS DATA I/2009-GENAP

OlehSatrio Agung Wicaksono, S.Kom., M.Kom

• List the capabilities of SQL SELECT statements

• Execute a basic SELECT statement

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ObjectiveSQL SELECT STATEMENT

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Capabilities of SQL SELECT StatementsSQL SELECT STATEMENT

SelectionProjection

Table 1 Table 2

Table 1Table 1

Join

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Basic SELECT StatementSQL SELECT STATEMENT

• SELECT identifies the columns to be displayed• FROM identifies the table containing those

columns

SELECT *|{[DISTINCT] column|expression [alias],...}FROM table;

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Selecting All ColumnsSQL SELECT STATEMENT

SELECT *FROM departments;

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Selecting Specific ColumnsSQL SELECT STATEMENT

SELECT department_id, location_idFROM departments;

• SQL statements are not case-sensitive. • SQL statements can be on one or more lines.• Keywords cannot be abbreviated or split

across lines.• Clauses are usually placed on separate lines.• Indents are used to enhance readability.

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Writing SQL StatementsSQL SELECT STATEMENT

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Arithmetic ExpressionsSQL SELECT STATEMENT

Operator Description

+ Add

- Subtract

* Multiply

/ Divide

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Using Arithmetic OperatorsSQL SELECT STATEMENT

SELECT last_name, salary, salary + 300FROM employees;

…

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Operator PrecedenceSQL SELECT STATEMENT

SELECT last_name, salary, 12*salary+100FROM employees;

SELECT last_name, salary, 12*(salary+100)FROM employees;

…

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P E N U T U P

Terima kasih

BASIS DATA I/2009-GENAP