7.8 KiB
Use OFFSET
and SOFFSET
to paginate points and series returned.
OFFSET
clause
OFFSET <N>
paginates N
points in the query results.
Syntax
SELECT_clause FROM_clause [WHERE_clause] [GROUP_BY_clause] [ORDER_BY_clause] LIMIT_clause OFFSET <N> [SLIMIT_clause]
N
specifies the number of points to paginate. The OFFSET
clause requires a LIMIT
clause.
{{% note %}}
Note: InfluxDB returns no results if the WHERE clause
includes a time range and the OFFSET clause
would cause InfluxDB to return points with timestamps outside of that time range.
{{% /note %}}
Examples
{{< expand-wrapper >}}
{{% expand "Paginate points" %}}
SELECT "water_level","location" FROM "h2o_feet" LIMIT 3 OFFSET 3
Output: {{% influxql/table-meta %}} Name: h2o_feet {{% /influxql/table-meta %}}
time | water_level | location |
---|---|---|
2019-08-17T00:06:00Z | 2.1160000000 | santa_monica |
2019-08-17T00:12:00Z | 7.8870000000 | coyote_creek |
2019-08-17T00:12:00Z | 2.0280000000 | santa_monica |
The query returns the fourth, fifth, and sixth points from the h2o_feet
measurement. If the query did not include OFFSET 3
, it would return the first, second,
and third points from that measurement.
{{% /expand %}}
{{% expand "Paginate points and include several clauses" %}}
SELECT MEAN("water_level") FROM "h2o_feet" WHERE time >= '2019-08-18T00:00:00Z' AND time <= '2019-08-18T00:42:00Z' GROUP BY *,time(12m) ORDER BY time DESC LIMIT 2 OFFSET 2 SLIMIT 1
Output:
{{% influxql/table-meta %}}
name: h2o_feet
tags: location=coyote_creek
{{% /influxql/table-meta %}}
time | mean |
---|---|
2019-08-18T00:12:00Z | 8.2725000000 |
2019-08-18T00:00:00Z | 8.4615000000 |
In this example:
- The
SELECT clause
specifies the InfluxQL MEAN() function. - The [
FROM clause
] (/influxdb/version/query-data/influxql/explore-data/select/#from-clause) specifies a single measurement. - The
WHERE
clause specifies the time range for the query. - The
GROUP BY
clause groups results by all tags (*
) and into 12-minute intervals. - The
ORDER BY time DESC
clause returns results in descending timestamp order. - The
LIMIT 2
clause limits the number of points returned to two. - The
OFFSET 2
clause excludes the first two averages from the query results. - The
SLIMIT 1
clause limits the number of series returned to one.
Without OFFSET 2
, the query would return the first two averages of the query results:
Output:
{{% influxql/table-meta %}}
name: h2o_feet
tags: location=coyote_creek
{{% /influxql/table-meta %}}
time | mean |
---|---|
2019-08-18T00:36:00Z | 7.8330000000 |
2019-08-18T00:24:00Z | 8.0710000000 |
{{< /expand >}}
{{< /expand-wrapper >}}
SOFFSET
clause
SOFFSET <N>
paginates N
series in the query results.
Syntax
SELECT_clause FROM_clause [WHERE_clause] GROUP BY *[,time(time_interval)] [ORDER_BY_clause] [LIMIT_clause] [OFFSET_clause] SLIMIT_clause SOFFSET <N>
N
specifies the number of series to paginate.
The SOFFSET
clause requires an [SLIMIT
clause](/influxdb/version/query-data/influxql/explore-data/limit-and-slimit/.
Using the SOFFSET
clause without an SLIMIT
clause can cause inconsistent
query results.
SLIMIT
queries must include GROUP BY *
.
{{% note %}}
Note: InfluxDB returns no results if the SOFFSET
clause paginates through more than the total number of series.
{{% /note %}}
Examples
{{< expand-wrapper >}}
{{% expand "Paginate series" %}}
Paginate series
SELECT "water_level" FROM "h2o_feet" GROUP BY * SLIMIT 1 SOFFSET 1
Output:
{{% influxql/table-meta %}}
name: h2o_feet
tags: location=santa_monica
{{% /influxql/table-meta %}}
time | water_level |
---|---|
2019-08-17T00:00:00Z | 2.0640000000 |
2019-08-17T00:06:00Z | 2.1160000000 |
2019-08-17T00:12:00Z | 2.0280000000 |
2019-08-17T00:18:00Z | 2.1260000000 |
2019-08-17T00:24:00Z | 2.0410000000 |
2019-08-17T00:30:00Z | 2.0510000000 |
2019-08-17T00:36:00Z | 2.0670000000 |
2019-08-17T00:42:00Z | 2.0570000000 |
The results above are partial, as the data set is quite large. The query returns data for the series associated with the h2o_feet
measurement and the location = santa_monica
tag. Without SOFFSET 1
, the query returns data for the series associated with the h2o_feet
measurement and the location = coyote_creek
tag.
{{% /expand %}}
{{% expand "Paginate points and include several clauses" %}}
Paginate series and include all clauses
SELECT MEAN("water_level") FROM "h2o_feet" WHERE time >= '2019-08-18T00:00:00Z' AND time <= '2019-08-18T00:42:00Z' GROUP BY *,time(12m) ORDER BY time DESC LIMIT 2 OFFSET 2 SLIMIT 1 SOFFSET 1
Output:
{{% influxql/table-meta %}}
name: h2o_feet
tags: location=santa_monica
{{% /influxql/table-meta %}}
time | mean |
---|---|
2019-08-18T00:12:00Z | 2.3360000000 |
2019-08-18T00:00:00Z | 2.3655000000 |
In this example:
- The
SELECT
clause specifies an InfluxQL function. - The
FROM
clause specifies a single measurement. - The
WHERE
clause specifies the time range for the query. - The
GROUP BY
clause groups results by all tags (*
) and into 12-minute intervals. - The
ORDER BY time DESC
clause returns results in descending timestamp order. - The
LIMIT 2
clause limits the number of points returned to two. - The
OFFSET 2
clause excludes the first two averages from the query results. - The
SLIMIT 1
clause limits the number of series returned to one. - The
SOFFSET 1
clause paginates the series returned.
Without SOFFSET 1
, the query would return the results for a different series:
Output:
{{% influxql/table-meta %}}
name: h2o_feet
tags: location=coyote_creek
{{% /influxql/table-meta %}}
time | mean |
---|---|
2019-08-18T00:12:00Z | 8.2725000000 |
2019-08-18T00:00:00Z | 8.4615000000 |
{{% /expand %}}
{{< /expand-wrapper >}}