diff --git a/crosstab/crosstab.py b/crosstab/crosstab.py
index 7a7cbac..a6d07c4 100644
--- a/crosstab/crosstab.py
+++ b/crosstab/crosstab.py
@@ -243,8 +243,9 @@ def _csv_to_sqlite(self: Crosstab) -> sqlite3.Connection:
         logger.debug("Creating 'data' table in SQLite database.")
         with conn:
             cursor = conn.cursor()
+            coldef = ", ".join([f'"{col}"' for col in self.csv_columns])
             cursor.execute(
-                f"CREATE TABLE data ({', '.join([f'"{col}"' for col in self.csv_columns])});",
+                f"CREATE TABLE data ({coldef});",
             )
             cursor.executemany(
                 f"INSERT INTO data VALUES ({', '.join(['?' for _ in self.csv_columns])});",