1. SQL Tutorial Basic SQL Commands
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2. Agenda Database Basics SQL Commands SELECT … FROM WHERE ORDER BY
GROUP BY
HAVING
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3. Database Basics In a relational database, data is stored in tables.
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4. 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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5. 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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6. SELECT … FROM SELECT “COLUMN_NAME” FROM “TABLE_NAME”
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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7. Interesting, right?
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