How to get first day of month
| select CAST(CAST(YEAR(getdate()) AS VARCHAR(4)) + '/' + CAST(MONTH(getdate()) AS VARCHAR(2)) + '/01' AS DATETIME) | |
| select CAST(CAST(YEAR(getdate()) AS VARCHAR(4)) + '/' + CAST(MONTH(getdate()) AS VARCHAR(2)) + '/01' AS DATETIME) | |