docs(sql): add LAG examples for time-based value comparisons

content/influxdb3/cloud-dedicated/query-data/sql/compare-values.md

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+---
+title: Compare values in SQL queries
+seotitle: Compare values across rows in SQL queries
+description: >
+  Use SQL window functions to compare values across different rows in your
+  time series data. Learn how to calculate differences, percentage changes,
+  and compare values at specific time intervals.
+menu:
+  influxdb3_cloud_dedicated:
+    name: Compare values
+    parent: Query with SQL
+    identifier: query-sql-compare-values
+weight: 205
+influxdb3/cloud-dedicated/tags: [query, sql, window functions]
+related:
+  - /influxdb3/cloud-dedicated/reference/sql/functions/window/
+  - /influxdb3/cloud-dedicated/query-data/sql/aggregate-select/
+list_code_example: |
+  ##### Calculate difference from previous value
+  ```sql
+  SELECT
+    time,
+    room,
+    temp,
+    temp - LAG(temp) OVER (
+      PARTITION BY room
+      ORDER BY time
+    ) AS temp_change
+  FROM home
+  ORDER BY room, time
+  ```
+source: /shared/influxdb3-query-guides/sql/compare-values.md
+---
+
+<!--
+//SOURCE content/shared/influxdb3-query-guides/sql/compare-values.md
+-->

content/influxdb3/cloud-serverless/query-data/sql/compare-values.md

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+---
+title: Compare values in SQL queries
+seotitle: Compare values across rows in SQL queries
+description: >
+  Use SQL window functions to compare values across different rows in your
+  time series data. Learn how to calculate differences, percentage changes,
+  and compare values at specific time intervals.
+menu:
+  influxdb3_cloud_serverless:
+    name: Compare values
+    parent: Query with SQL
+    identifier: query-sql-compare-values
+weight: 205
+influxdb3/cloud-serverless/tags: [query, sql, window functions]
+related:
+  - /influxdb3/cloud-serverless/reference/sql/functions/window/
+  - /influxdb3/cloud-serverless/query-data/sql/aggregate-select/
+list_code_example: |
+  ##### Calculate difference from previous value
+  ```sql
+  SELECT
+    time,
+    room,
+    temp,
+    temp - LAG(temp) OVER (
+      PARTITION BY room
+      ORDER BY time
+    ) AS temp_change
+  FROM home
+  ORDER BY room, time
+  ```
+source: /shared/influxdb3-query-guides/sql/compare-values.md
+---
+
+<!--
+//SOURCE content/shared/influxdb3-query-guides/sql/compare-values.md
+-->

content/influxdb3/clustered/query-data/sql/compare-values.md

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+---
+title: Compare values in SQL queries
+seotitle: Compare values across rows in SQL queries
+description: >
+  Use SQL window functions to compare values across different rows in your
+  time series data. Learn how to calculate differences, percentage changes,
+  and compare values at specific time intervals.
+menu:
+  influxdb3_clustered:
+    name: Compare values
+    parent: Query with SQL
+    identifier: query-sql-compare-values
+weight: 205
+influxdb3/clustered/tags: [query, sql, window functions]
+related:
+  - /influxdb3/clustered/reference/sql/functions/window/
+  - /influxdb3/clustered/query-data/sql/aggregate-select/
+list_code_example: |
+  ##### Calculate difference from previous value
+  ```sql
+  SELECT
+    time,
+    room,
+    temp,
+    temp - LAG(temp) OVER (
+      PARTITION BY room
+      ORDER BY time
+    ) AS temp_change
+  FROM home
+  ORDER BY room, time
+  ```
+source: /shared/influxdb3-query-guides/sql/compare-values.md
+---
+
+<!--
+//SOURCE content/shared/influxdb3-query-guides/sql/compare-values.md
+-->

content/influxdb3/core/query-data/sql/compare-values.md

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+---
+title: Compare values in SQL queries
+seotitle: Compare values across rows in SQL queries
+description: >
+  Use SQL window functions to compare values across different rows in your
+  time series data. Learn how to calculate differences, percentage changes,
+  and compare values at specific time intervals.
+menu:
+  influxdb3_core:
+    name: Compare values
+    parent: Query with SQL
+    identifier: query-sql-compare-values
+weight: 205
+influxdb3/core/tags: [query, sql, window functions]
+related:
+  - /influxdb3/core/reference/sql/functions/window/
+  - /influxdb3/core/query-data/sql/aggregate-select/
+list_code_example: |
+  ##### Calculate difference from previous value
+  ```sql
+  SELECT
+    time,
+    room,
+    temp,
+    temp - LAG(temp) OVER (
+      PARTITION BY room
+      ORDER BY time
+    ) AS temp_change
+  FROM home
+  ORDER BY room, time
+  ```
+source: /shared/influxdb3-query-guides/sql/compare-values.md
+---
+
+<!--
+//SOURCE content/shared/influxdb3-query-guides/sql/compare-values.md
+-->

content/influxdb3/enterprise/query-data/sql/compare-values.md

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+---
+title: Compare values in SQL queries
+seotitle: Compare values across rows in SQL queries
+description: >
+  Use SQL window functions to compare values across different rows in your
+  time series data. Learn how to calculate differences, percentage changes,
+  and compare values at specific time intervals.
+menu:
+  influxdb3_enterprise:
+    name: Compare values
+    parent: Query with SQL
+    identifier: query-sql-compare-values
+weight: 205
+influxdb3/enterprise/tags: [query, sql, window functions]
+related:
+  - /influxdb3/enterprise/reference/sql/functions/window/
+  - /influxdb3/enterprise/query-data/sql/aggregate-select/
+list_code_example: |
+  ##### Calculate difference from previous value
+  ```sql
+  SELECT
+    time,
+    room,
+    temp,
+    temp - LAG(temp) OVER (
+      PARTITION BY room
+      ORDER BY time
+    ) AS temp_change
+  FROM home
+  ORDER BY room, time
+  ```
+source: /shared/influxdb3-query-guides/sql/compare-values.md
+---
+
+<!--
+//SOURCE content/shared/influxdb3-query-guides/sql/compare-values.md
+-->