46 lines
2.3 KiB
Markdown
46 lines
2.3 KiB
Markdown
# Util Set all zero usage parts to ignore
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Analysis generated on: 4/2/2025 10:16:13 AM
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---
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## SQL Statement
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```sql
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UPDATE [Util Selection C1] SET [Util Selection C1].Flag = "1"
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WHERE ((([Util Selection C1].USAGE)=0));
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```
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## Dependencies
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- *None*
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## Parameters
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- *None*
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## What it does
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**SQL Update Statement**
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==========================
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### Purpose
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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"`.
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### Syntax Breakdown
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```sql
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UPDATE [Util Selection C1]
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SET [Util Selection C1].Flag = "1"
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WHERE ((([Util Selection C1].USAGE)=0));
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```
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* **UPDATE**: This keyword is used to update existing records in the specified table.
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* **[Util Selection C1]**: The target table, `Util Selection C1`, where the data will be modified.
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* **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"`.
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* \[Util Selection C1\] refers to the table itself, and this indicates that we are setting the value of a specific column within that table.
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* `.Flag` is an alias for the `Flag` column, allowing us to access it by its name instead of its full path.
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* **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.
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### Condition Explanation
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The `WHERE` clause applies a filtering condition:
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* \(([Util Selection C1].USAGE) = 0\) means that only records with a value of `0` for the `USAGE` column should be updated.
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* This implies that records with non-zero values in the `USAGE` column are not updated by this SQL statement.
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### Example Use Case
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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.
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### Note
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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.
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