PSLine2000Documentation/Queries/make-filter1.md

make-filter1

Analysis generated on: 4/2/2025 10:02:41 AM

SQL Statement

SELECT Trim([PRDNO])+Right(Trim([DRAW#]),1) AS PN INTO filter1
FROM [RMSFILES#_DANNYF];

Dependencies

• None

Parameters

• None

What it does

SQL Code Description

Table and Schema Overview

The provided SQL code is designed to operate on a database table named [RMSFILES#_DANNYF]. This table contains columns, one of which is presumably the primary key or unique identifier, denoted as PRDNO in this instance. The specific structure and contents of the table are not explicitly defined here, but it is assumed to be a valid database schema.

SQL Code Breakdown

1. Column Selection

The code selects columns from the [RMSFILES#_DANNYF] table. In this case, only one column, PRDNO, is specified for selection:

FROM [RMSFILES#_DANNYF];

2. Trimming and String Manipulation

The selected columns are subject to trimming operations using the following functions:

• Trim([PRDNO]): Removes whitespace characters (spaces, tabs, etc.) from both the beginning and end of the string values in the PRDNO column.
• Right(Trim([DRAW#]),1): Trims the trailing characters from the first character of a string value in the DRAW# column. The RIGHT() function returns the specified number of characters (in this case, 1) starting from the right end of the string.

The resulting trimmed values are assigned to new names for clarity:

SELECT Trim([PRDNO])+Right(Trim([DRAW#]),1) AS PN INTO filter1;

3. Aliasing and Output

The trimmed column selections are given an alias (PN) for better readability in the output. The INTO keyword is used to specify a new name for the result set, which is assigned as filter1.

Purpose of the SQL Code

In summary, this SQL code selects data from a specified table, trims whitespace characters from specific column values, and assigns the resulting trimmed strings to a new alias. The exact purpose and application of this code will depend on the context in which it is used within the larger database system.

Example Use Case

This code might be part of an ETL (Extract, Transform, Load) process or data cleaning task, where the aim is to standardize input data by removing unnecessary whitespace characters. The output can then be further processed, transformed, or loaded into another database or storage solution for analysis or reporting purposes.

Conclusion

The SQL code snippet provided illustrates basic string manipulation techniques using built-in functions like Trim() and Right(). By understanding these operations and their applications, developers can effectively manage data quality and prepare it for downstream processing tasks.