SQL statements begin with a verb and can include clauses or
names. For example:
SELECT PartNumber FROM PurchDB.Parts
| | | | | |
| | | owner | |
| | | name | |
| | | | |
statement | | table |
verb | | name |
| | |
column +----------------+
name |
|
FROM
clause |
Statements always contain a verb, one
or more words that describe the action of the statement. A statement
can also contain one or more clauses. A clause
is a group of names and keywords describing what the verb should
operate on. A verb can operate on a named object, such as a table or
a column. Some statements can contain expressions or search conditions.
Expressions specify a value. Search conditions screen data against
specific criteria:
SELECT * FROM PurchDB.Parts WHERE SalesPrice > 200.00
| | | | |
all | | expression |
columns | | |
| +-----------------+
| | |
| search condition |
| |
+-----------------------+
|
WHERE
clause |
The syntax of SQL is fully described in chapters 7-10 of this
manual.
