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SQL Month First Day Selection Methods
stackoverflow.com/questions/1520789/how-can-i-select-the-first-day-of-a-month-in-sqlYapay zekadan makale özeti
- Historical Solutions
- Simple query using GETDATE() and month offset works for SQL Server 2009
- SQL Server 2012 introduced EOMONTH function for month first
- SQL Server 2022 added DATETRUNC function for this purpose
- Modern Approaches
- DATE_ADD function combines current date with last day of month
- Format function can be used with YYYYMMDD format
- DATE type avoids explicit time conversion in comparisons
- DATE_ADD with INTERVAL can handle month start dates
- Implementation Details
- Month offset can be adjusted from -1 (current month) to 0 (next month)
- Format truncation keeps only 6 leftmost characters
- DATE type works well with time parameters in most cases
- DATE function in condition clause can significantly slow down queries