55 lines
2.2 KiB
Markdown
55 lines
2.2 KiB
Markdown
# K_NUM_2
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Analysis generated on: 4/2/2025 10:00:28 AM
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---
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## SQL Statement
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```sql
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SELECT DISTINCTROW K_NUM_1.*
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FROM K_NUM_1
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WHERE ((K_NUM_1.Machine="C-1000" Or K_NUM_1.Machine="C-2000" Or K_NUM_1.Machine="C-3000" Or K_NUM_1.Machine="C-4000" Or K_NUM_1.Machine="C-5000" Or K_NUM_1.Machine="C-6000" Or K_NUM_1.Machine="C-7000" Or K_NUM_1.Machine="C-8000" Or K_NUM_1.Machine="C-9000"));
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```
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## Dependencies
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- [[Queries/K_NUM_1]]
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## Parameters
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- *None*
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## What it does
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**SQL Query Description**
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==========================
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### Overview
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This SQL query retrieves a distinct row from the `K_NUM_1` table where the value of the `Machine` column matches one of eight specified machine codes.
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### Breakdown
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#### Select Statement
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```sql
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SELECT DISTINCTROW K_NUM_1.*
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```
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* `SELECT`: Retrieves data from the database.
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* `DISTINCTROW`: Ensures that only unique rows are returned, eliminating duplicates.
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* `K_NUM_1.*`: Selects all columns (`*`) from the `K_NUM_1` table.
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#### From Clause
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```sql
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FROM K_NUM_1
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```
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* Specifies the table (`K_NUM_1`) to retrieve data from.
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#### Where Clause
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```sql
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WHERE ((K_NUM_1.Machine="C-1000" Or K_NUM_1.Machine="C-2000" ... Or K_NUM_1.Machine="C-9000"));
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```
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* Filters the results to only include rows where the `Machine` column value matches one of the specified machine codes.
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* The `Or` operator (`or`) is used in conjunction with multiple conditions, creating a logical OR expression.
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* Each condition checks if the `Machine` column equals a specific machine code (e.g., "C-1000").
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### Example Use Case
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This query can be used to retrieve unique records from the `K_NUM_1` table where the machine type is known. For instance, if you need to report on all instances of machines with specific codes, this query would provide a concise and efficient way to do so.
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### Notes
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* This query assumes that the `Machine` column in the `K_NUM_1` table contains only string values matching the specified machine codes.
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* Using an OR operator within the WHERE clause can lead to performance issues if the number of conditions is large. Consider optimizing this query by using indexes on the `Machine` column or rewriting it as a series of separate queries with AND operators instead of OR operators.
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