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The WHERE statement is used to extract the logs that meet the specified conditions.

Syntax Format

* | SELECT column (KEY) WHERE column (KEY) operator value

The operator can be =, <>, >, <, >=, <=, BETWEEN, IN, or LIKE.

Note：

• In SQL, search conditions deliver higher performance than filters. You are advised to use search conditions to meet data filtering requirements. For example, you can use status:>400 | select count(*) as logCounts instead of * | select count(*) as logCounts where status>400 to get the statistical result faster.
• The WHERE statement does not allow the AS clause. For example, if level:* | select level as log_level where log_level='ERROR' is run, an error will be reported because the statement does not comply with the SQL-92 specifications.

Syntax Example

Query logs with status code greater than 400 in the log data:

* | SELECT * WHERE status > 400

Query the number of logs whose request method is GET and client IP is 192.168.10.101 in the log data:

* | SELECT count(*) as count WHERE method='GET' and remote_addr='192.168.10.101'

Count the average size of requests with the URL suffix of .mp4:

* | SELECT round(sum(body_bytes_sent) / count(body_bytes_sent), 2) AS avg_size  WHERE url like '%.mp4'