PSLine2000Documentation/Queries/Util Set all zero usage par...

2.3 KiB

Util Set all zero usage parts to ignore

Analysis generated on: 4/2/2025 10:16:13 AM

SQL Statement

UPDATE [Util Selection C1] SET [Util Selection C1].Flag = "1"
WHERE ((([Util Selection C1].USAGE)=0));

Dependencies

  • None

Parameters

  • None

What it does

SQL Update Statement

Purpose

The provided SQL update statement is used to modify existing records in the Util Selection C1 table by setting the Flag column to a value of "1".

Syntax Breakdown

UPDATE [Util Selection C1]
SET [Util Selection C1].Flag = "1"
WHERE ((([Util Selection C1].USAGE)=0));
  • UPDATE: This keyword is used to update existing records in the specified table.
  • [Util Selection C1]: The target table, Util Selection C1, where the data will be modified.
  • SET [Util Selection C1].Flag = "1": Specifies that the value of the Flag column for each record in the table should be updated to "1".
    • Util Selection C1
    • .Flag is an alias for the Flag column, allowing us to access it by its name instead of its full path.
  • WHERE ((([Util Selection C1].USAGE)=0)): Applies conditions to filter which records should be updated. Only rows where the condition specified in the WHERE clause are true will be updated.

Condition Explanation

The WHERE clause applies a filtering condition:

  • ([Util Selection C1].USAGE) = 0 means that only records with a value of 0 for the USAGE column should be updated.
    • This implies that records with non-zero values in the USAGE column are not updated by this SQL statement.

Example Use Case

Consider that you have a database containing information about different utility services, where each service is associated with a unique identifier (USAGE) and has an optional flag indicating whether it's enabled or disabled. This update statement can be used to mark all unused (i.e., USAGE = 0) services as active (Flag = "1"), effectively toggling their status from inactive to active.

Note

This code is case-sensitive due to the use of square brackets around table and column names, which are often required in SQL for proper syntax.