PSLine2000Documentation/Queries/Processes by Req 1.md

Processes by Req 1

Analysis generated on: 4/2/2025 10:06:58 AM

SQL Statement

SELECT Left$([PN],7) AS prt, Trim$(Right$([PN],1)) AS Rev, [Process by List].PN AS PartNumber
FROM [Process by List]
ORDER BY Left$([PN],7), Trim$(Right$([PN],1)) DESC;

Dependencies

• None

Parameters

• None

What it does

SQL Query Description

Overview

This SQL query retrieves a subset of data from the [Process by List] table and organizes it based on a specific pattern.

Query Breakdown

Select Clause

SELECT Left$([PN],7) AS prt, Trim$(Right$([PN],1)) AS Rev, [Process by List].PN AS PartNumber

• The query selects three columns:
  • Left$([PN],7) : Truncates the first 7 characters from the left side of the [PN] column and assigns it to a new column named prt.
  • Trim$(Right$([PN],1)) : Removes the last character from the right side of the [PN] column and assigns it to a new column named rev. The $ symbol indicates that this is a string function.
  • [Process by List].PN : Retrieves the full value of the [PN] column from the [Process by List] table.

From Clause

FROM [Process by List]

• Specifies the table to retrieve data from, which is [Process by List].

Order By Clause

ORDER BY Left$([PN],7), Trim$(Right$([PN],1)) DESC;

• Orders the retrieved data based on two columns:
  • Left$([PN],7) : Truncates the first 7 characters from the left side of the [PN] column. The order is descending.
  • Trim$(Right$([PN],1)) : Removes the last character from the right side of the [PN] column. The order is also descending.

Query Behavior

• The query truncates the first 7 characters from the left side of the [PN] column and assigns it to the prt column, effectively extracting a unique identifier.
• The last character is removed from the right side of the [PN] column and assigned to the rev column. This creates a two-character code that represents the full value of the [PN] column minus the first 7 characters.

Example Use Case

This query can be used in various scenarios where unique identifiers need to be extracted from a larger string, such as:

• Data processing: Extracting a subset of data for further processing.
• Data filtering: Creating a new dataset based on specific criteria.
• Reporting and analytics: Generating reports or summaries with distinct identifiers.