WHERE clause
Use the WHERE clause to filter results based on fields, tags, or timestamps.
Syntax
SELECT_clause FROM_clause WHERE <conditional_expression> [(AND|OR) <conditional_expression> [...]]Note: Unlike InfluxQL, SQL supports OR in the WHERE clause to
specify multiple conditions, including time ranges.
Examples
Note that single quotes are required for string literals in the WHERE clause.
Filter data based on field values
SELECT *
FROM "h2o_feet"
WHERE "water_level" >= 9.78Filter data based on specific tag and field values
SELECT *
FROM "h2o_feet"
WHERE "location" = 'santa_monica' and "level description" = 'below 3 feet' Filter data within a specific time period
SELECT *
FROM h2o_feet
WHERE "location" = 'santa_monica'
AND "time" >= '2019-08-19T12:00:00Z' AND "time" <= '2019-08-19T13:00:00Z'Filter data by dynamic date ranges
Use date and time functions to filter data by relative time periods that automatically update.
Get data from yesterday
SELECT *
FROM h2o_feet
WHERE "location" = 'santa_monica'
AND time >= DATE_TRUNC('day', NOW() - INTERVAL '1 day')
AND time < DATE_TRUNC('day', NOW())Get data from the last 24 hours
SELECT *
FROM h2o_feet
WHERE time >= NOW() - INTERVAL '1 day' AND location = 'santa_monica'Get data from the current week
SELECT *
FROM h2o_feet
WHERE time >= DATE_TRUNC('week', NOW()) AND location = 'santa_monica'Filter data using the OR operator
SELECT *
FROM "h2o_feet"
WHERE "level description" = 'less than 3 feet' OR "water_level" < 2.5Was this page helpful?
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