PSLine2000Documentation/Queries/Processes by material 2.md

Processes by material 2

Analysis generated on: 4/2/2025 10:06:04 AM

SQL Statement

SELECT [Processes by material].prt, Max([Processes by material].Rev) AS Rev, Max([Processes by material].PartNumber) AS PN INTO [Process by material]
FROM [Processes by material]
GROUP BY [Processes by material].prt
ORDER BY [Processes by material].prt, Max([Processes by material].Rev) DESC;

Dependencies

• None

Parameters

• [Forms]![Material Upgrade]![txtMaterial] (Empty)

What it does

SQL Query: Extracting Process Information by Material

Overview

This SQL query extracts and aggregates process information from a table named [Processes by material]. It calculates the maximum revision number (Max([Processes by material].Rev)) and part number (Max([Processes by material].PartNumber)) for each unique process identifier ([Processes by material].prt).

Query Breakdown

1. SELECT Clause

SELECT [Processes by material].prt, Max([Processes by material].Rev) AS Rev, 
       Max([Processes by material].PartNumber) AS PN

• Selects the following columns:
  • [Processes by material].prt: The process identifier.
  • Max([Processes by material].Rev) AS Rev: The maximum revision number for each process. The alias Rev is used to give it a meaningful name in the output.
  • Max([Processes by material].PartNumber) AS PN: The maximum part number for each process. The alias PN is used to give it a meaningful name in the output.

2. FROM Clause

FROM [Processes by material]

• Specifies the table from which to extract data: [Processes by material].

3. GROUP BY Clause

GROUP BY [Processes by material].prt

• Groups the extracted data by the process identifier ([Processes by material].prt). This means that all rows with the same value in this column will be grouped together.

4. ORDER BY Clause

ORDER BY [Processes by material].prt, Max([Processes by material].Rev) DESC;

• Orders the grouped data first by the process identifier ([Processes by material].prt) and then by the maximum revision number in descending order (Max([Processes by material].Rev)). This ensures that processes with higher revision numbers appear before those with lower revision numbers, while still maintaining their original ordering based on the process identifier.

5. INTO Clause

INTO [Process by material]

• Specifies a destination table where the processed data will be stored: [Process by material].

Result

The resulting table [Process by material] contains the following columns:

Column Name	Data Type
prt	string
Rev	integer
PN	integer

Where:

• prt: The process identifier.
• Rev: The maximum revision number for each process.
• PN: The maximum part number for each process.

This query helps identify the most up-to-date process information, including the highest revision and part numbers, for each unique process identifier.