Make column names quoted identifiers

adding double quotes around the column names to make them quoted identifiers
allows using SQL Server keywords such as "close" or "open" as column names.

Author: William Smith

awswrangler/sqlserver.py

@@ -90,7 +90,7 @@ def _create_table(
         varchar_lengths=varchar_lengths,
         converter_func=_data_types.pyarrow2sqlserver,
     )
-    cols_str: str = "".join([f"{k} {v},\n" for k, v in sqlserver_types.items()])[:-2]
+    cols_str: str = "".join([f'"{k}" {v},\n' for k, v in sqlserver_types.items()])[:-2]
     table_identifier = _get_table_identifier(schema, table)
     sql = (
         f"IF OBJECT_ID(N'{table_identifier}', N'U') IS NULL BEGIN CREATE TABLE {table_identifier} (\n{cols_str}); END;"
@@ -416,7 +416,7 @@ def to_sql(
             table_identifier = _get_table_identifier(schema, table)
             insertion_columns = ""
             if use_column_names:
-                insertion_columns = f"({', '.join(df.columns)})"
+                insertion_columns = "({})".format(", ".join(f'"{col}"' for col in df.columns))
             placeholder_parameter_pair_generator = _db_utils.generate_placeholder_parameter_pairs(
                 df=df, column_placeholders=column_placeholders, chunksize=chunksize
             )