Sql server get first of month from date

- Sql server get first day of month from date
- Sql server get first and last day of month from date
- Sql server first of month from date
- Sql server first day of month from date
- Sql server get first date of current month
- Sql server get first day of month from datetime
- Sql server get first date of previous month
- Sql server get first date of next month