63 lines
2.3 KiB
Markdown
63 lines
2.3 KiB
Markdown
# MachineNames_Crosstab1
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Analysis generated on: 4/2/2025 10:01:54 AM
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---
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## SQL Statement
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```sql
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TRANSFORM Count([WC2]) AS [The Value]
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SELECT [MachineName], Count([WC2]) AS [Row Summary]
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FROM MachineNames
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GROUP BY [MachineName]
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PIVOT [WC2];
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```
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## Dependencies
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- [[Tables/MachineNames]]
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## Parameters
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- *None*
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## What it does
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**SQL Code Explanation**
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==========================
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### Table Structure and Data Assumptions
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This SQL code is assumed to be part of a larger query that operates on a database table named `MachineNames`. The table contains columns related to machine names, including at least one column named `[WC2]`, which is used as the input for a pivot operation.
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### Code Breakdown
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---------------
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#### 1. `TRANSFORM Count([WC2]) AS [The Value]`
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This line transforms the count of values in the `[WC2]` column into a new value with the alias `[The Value]`. This step prepares the data for the pivot operation by aggregating the counts.
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#### 2. `SELECT [MachineName], Count([WC2]) AS [Row Summary] FROM MachineNames GROUP BY [MachineName]`
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This section selects the `MachineName` column and aggregates the count of values in the `[WC2]` column using the `GROUP BY` clause. The resulting data is then filtered to only include unique machine names.
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#### 3. `PIVOT [WC2];`
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Finally, this line pivots the aggregated counts for each machine name into separate columns based on the original `[WC2]` values. However, there seems to be a discrepancy in the code - it should be `PIVOT [The Value]` instead of `[WC2]`. Assuming the correct code is used:
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* The pivot operation transforms the aggregated counts into separate column headers.
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* Each machine name becomes a new row with its corresponding values as separate columns.
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**Example Output**
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-----------------
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Assuming the original data in `MachineNames` table looks like this:
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| MachineName | WC2 |
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|-------------|-----|
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| Mach1 | 10 |
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| Mach2 | 20 |
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| Mach3 | 30 |
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The transformed output would look something like this:
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| MachineName | Mach1 | Mach2 | Mach3 |
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|-------------|-------|-------|-------|
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| Mach1 | 10 | NULL | NULL |
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| Mach2 | NULL | 20 | NULL |
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| Mach3 | NULL | NULL | 30 |
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In this example, the pivot operation has transformed each machine name into a separate row with its corresponding values as separate columns.
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