Su, Xiaomeng 04d4597cf3 dli_sqlreference_0511_version

Reviewed-by: Pruthi, Vineet <vineet.pruthi@t-systems.com>
Co-authored-by: Su, Xiaomeng <suxiaomeng1@huawei.com>
Co-committed-by: Su, Xiaomeng <suxiaomeng1@huawei.com>

2023-11-02 14:34:08 +00:00

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WHERE Filtering Clause

Function

This statement is used to filter the query results using the WHERE clause.

Syntax

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SELECT [ALL | DISTINCT] attr_expr_list FROM table_reference
  WHERE where_condition;

Keyword

All is used to return repeated rows. By default, all repeated rows are returned. It is followed by asterisks (*) only. Otherwise, an error will occur.
DISTINCT is used to remove the repeated line from the result.
WHERE is used to filter out records that do not meet the condition and return records that meet the condition.

Precautions

The to-be-queried table must exist.

Example

To filter the records in which the scores are higher than 90 and lower than 95 in the student table, run the following statement:

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SELECT * FROM student
  WHERE score > 90 AND score < 95;

Parent topic: Filtering

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