64 lines
2.6 KiB
Markdown
64 lines
2.6 KiB
Markdown
# Query2
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Analysis generated on: 4/2/2025 10:09:20 AM
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---
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## SQL Statement
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```sql
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SELECT DISTINCTROW Left$([PartNumber],7) AS Expr1, Right$([PartNumber],1) AS Expr2, Metals.PartNo, Metals.Gauge, Metals.Density, Process.PartName
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FROM Process INNER JOIN Metals ON Process.MetalType = Metals.PartNo
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WHERE ((Metals.PartNo="8110611"))
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ORDER BY Left$([PartNumber],7), Right$([PartNumber],1) DESC;
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```
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## Dependencies
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- [[Tables/Process]]
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- [[Queries/Metals]]
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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 specific data from two joined tables, `Process` and `Metals`, based on a condition applied to the `Metals.PartNo` column. The retrieved columns are modified using string manipulation functions.
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### Step-by-Step Explanation
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#### 1. Selecting Distinct Row Values
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The `SELECT DISTINCTROW` statement is used to retrieve only unique rows from the result set.
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#### 2. String Manipulation Functions
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Two string manipulation functions are applied to the `PartNumber` column:
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* `Left$([PartNumber],7)`: This function takes the first 7 characters from the left side of the `PartNumber`. The `$` symbol is used to indicate that the function operates on a string.
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* `Right$([PartNumber],1)`: This function takes the last character from the right side of the `PartNumber`.
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The resulting strings are assigned aliases as `Expr1` and `Expr2`, respectively.
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#### 3. Joining Tables
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The query joins the `Process` table with the `Metals` table on the condition that `MetalType` in `Process` equals `PartNo` in `Metals`. This allows the query to access data from both tables based on a common column.
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#### 4. Filtering Data
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A filter is applied using the `WHERE` clause, which only includes rows where the value of `Metals.PartNo` is equal to `'8110611'`.
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#### 5. Sorting Results
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The results are sorted in descending order based on both `Left$([PartNumber],7)` and `Right$([PartNumber],1)`. This means that the rows will be ordered first by the last character of the part number (in reverse order), and then by the first 7 characters of the part number.
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#### 6. Retrieving Additional Data
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The query retrieves additional data from both tables, including:
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* `Metals.PartNo`: The part number of the metal.
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* `Metals.Gauge`: The gauge of the metal.
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* `Metals.Density`: The density of the metal.
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* `Process.PartName`: The name of the process associated with the metal.
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### Result
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The query will return a list of rows that meet the specified conditions, with the modified `PartNumber` values and additional data from both tables.
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