fix: Add missing operations for SQL Server - ExtractEpochSeconds, Ext…

…ractDayOfYear, ExtractWeekOfYear (#870)

* Add ExtractEpochSeconds operation and other date/time ones

* Removed additional functions

third_party/ibis/ibis_mssql/compiler.py

@@ -371,10 +371,12 @@ def _day_of_week_name(t, expr):
     (sa_arg,) = map(t.translate, expr.op().args)
     return sa.func.trim(sa.func.format(sa_arg, 'dddd'))
 
+
 def _string_join(t, expr):
     sep, elements = expr.op().args
     return sa.func.concat(*map(t.translate, elements))
 
+
 _operation_registry = alch._operation_registry.copy()
 
 _operation_registry.update(
@@ -418,11 +420,19 @@ def _string_join(t, expr):
         ops.ExtractYear: _extract('year'),
         ops.ExtractMonth: _extract('month'),
         ops.ExtractDay: _extract('day'),
+        ops.ExtractDayOfYear: _extract('dayofyear'),
         ops.ExtractHour: _extract('hour'),
         ops.ExtractMinute: _extract('minute'),
         ops.ExtractSecond: _extract('second'),
         ops.ExtractMillisecond: _extract('millisecond'),
+        ops.ExtractWeekOfYear: _extract('iso_week'),
         ops.Strftime: _strftime,
+        ops.ExtractEpochSeconds: fixed_arity(
+            lambda x: sa.cast(
+                sa.func.datediff(sa.text('s'), '1970-01-01 00:00:00', x), sa.BIGINT
+            ),
+            1,
+        ),
         # newly added
         ops.Lag: _lag,
         ops.Lead: _lead,