SQL Tutorial
Basic SQL Commands
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Agenda
• Database Basics
• SQL Commands
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SELECT … FROM
WHERE
ORDER BY
GROUP BY
HAVING
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Database Basics
In a relational database, data is stored in tables.
Tables
Database
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Database Basics
Each table consists of columns and rows. Each column is a
field in a record, and there is a column name associated with
each column.
Columns
Tables
Database
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Database Basics
Each row represents one record. When we say how many
records we have, we are referring to the number of rows.
Columns
Tables
Rows
Database
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SELECT … FROM
SQL is structured similar to the English language. The basic
command for retrieving data from a database table is to
SELECT data FROM a table. Not surprisingly, the keywords
"SELECT" and "FROM" make up the core of a SQL statement.
The syntax for “SELECT… FROM” is:
SELECT “COLUMN_NAME”
FROM “TABLE_NAME”
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