Retrieving Last 7 Days' Data in SQL Server
When loading data from an SQL Server table into a MySQL table, you may encounter the need to filter the data based on a time range. To retrieve the last seven days' worth of data, you can utilize the power of SQL Server's date manipulation functions.
Query:
<code class="sql">SELECT id,
NewsHeadline as news_headline,
NewsText as news_text,
state,
CreatedDate as created_on
FROM News
WHERE CreatedDate >= DATEADD(day,-7, GETDATE())
order by createddate DESC</code>
Explanation:
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DATEADD: This function allows you to add or subtract a specified number of days from a given date. In this case, DATEADD(day,-7, GETDATE()) subtracts seven days from the current date, providing the starting point for the time range.
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GETDATE(): This function returns the current date and time in the SQL Server system.
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>=: The greater than or equal to operator ensures that all rows with CreatedDate values within or after the last seven days are included in the selection.
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ORDER BY: Finally, the query is ordered in descending order based on CreatedDate, allowing you to retrieve the most recent entries first.
Note:
- Verify that the data type of the CreatedDate column in the SQL Server table is compatible with the created_on column in the MySQL table.
- Ensure that the MySQL connection parameters are correctly configured in Pentaho before attempting the data load.
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