Simplified SQL Query

Original SQL Summary

The original SQL query retrieves multiple columns from the [Suspend Report] table with specific formatting and transformations applied to certain fields. The primary transformations include:

• Changing data types (e.g., converting to string with CStr)
• Trimming whitespace from certain string fields.
• Conditional date transformations using IIf and DateValue.

Refactored SQL Code

Here’s a simplified and minified version of the SQL query while preserving its functionality:

SELECT 
    CStr([CUSTOMER CODE]) AS [CUSTOMER COD],
    [Suspend Report].BRANCH,
    Trim([ORDER NUMBER]) AS DO,
    [Suspend Report].[ITEM NUMBER],
    Trim([REQUESTED PART NO]) AS [REQ P/N],
    Trim([SUPPLIED PART NO]) AS [SUPPLIED P/N],
    [Suspend Report].[PART NAME],
    Trim([CUSTOMER REF]) AS [DIST REF NO],
    [Suspend Report].[ORDER DATE],
    [Suspend Report].[ORDER QTY],
    [Suspend Report].[ALLOCATED QTY],
    [Suspend Report].[BACK ORDER QTY],
    [Suspend Report].[SUSPEND QTY],
    [Suspend Report].[INVOICED QTY],
    [Suspend Report].[CANCELLED QTY],
    [Suspend Report].[STOCK POINT],
    [Suspend Report].[DO UNT PRICE],
    [Suspend Report].[DO AMOUNT],
    [Suspend Report].[ORDER CURRENCY],
    [Suspend Report].[MARKING CODE],
    [Suspend Report].[CUSTOMER INFORMATION],
    [Suspend Report].[L/C NUMBER],
    Trim([CUSTOMER NAME]) AS CUSTOMERNAME,
    [Suspend Report].[REQUIRED DATE],
    [Suspend Report].[STOCK LEVEL A408],
    [Suspend Report].[STOCK LEVEL A346],
    [Suspend Report].[STOCK LEVEL A526],
    [Suspend Report].[STOCK LEVEL A210],
    [Suspend Report].[OTHER SYSTEM DELIVERY DATE],
    DateValue(IIf([OTHER SYSTEM DELIVERY DATE]=0, "01/01/1900", 
        IIf([DO C&H ORDER TYPE]="R", DateAdd("d", -7, CDate(Format([OTHER SYSTEM DELIVERY DATE], "0000\/00\/00"))), 
        CDate(Format([OTHER SYSTEM DELIVERY DATE], "0000\/00\/00"))))) AS [REQ DATE],
    DateSerial(Left([ORDER DATE], 4), Mid([ORDER DATE], 5, 2), Right([ORDER DATE], 2)) AS [ORD DATE],
    [Suspend Report].[DC BRANCH RANK] AS [DC RANK],
    DateValue(IIf([OTHER SYSTEM DELIVERY DATE]=0, "01/01/1900", 
        CDate(Format([OTHER SYSTEM DELIVERY DATE], "0000\/00\/00")))) AS [REQ DATE2],
    [Suspend Report].[DO C&H ORDER TYPE],
    [Suspend Report].[SUPPLIER CODE],
    [Suspend Report].[EDD]
FROM [Suspend Report]
ORDER BY Trim([ORDER NUMBER]), [Suspend Report].[ITEM NUMBER];

Key Changes Made

1. Structure and Readability: The query structure retains clarity while becoming more concise, ensuring it is easy to read and maintain.
2. Data Functionality Maintained: Preserved all transformations and columns without changing fundamental logic or calculations.

Testing the SQL Query

To ensure the functionality of the refactored SQL query, here are some recommended test cases:

Test Cases

1. Basic Retrieval:

   • Input: Execute the query against the [Suspend Report] database table.
   • Expected Output: A dataset with all specified fields properly formatted and no errors in data types.

2. Edge Cases:

   • Inputs: Add entries with OTHER SYSTEM DELIVERY DATE as 0 to check the date handling.
   • Expected Output: Correct processing to return "01/01/1900" in [REQ DATE] and [REQ DATE2].

Conclusion

By following these simplifications and maintaining rigorous testing, the transformed SQL retains all original functionality while enhancing clarity and maintainability. If looking for further advances in data science or SQL best practices, explore resources available on the Enterprise DNA Platform.