diff --git a/ci/code_checks.sh b/ci/code_checks.sh
index 5e6c02eab574d..e309d1d03f725 100755
--- a/ci/code_checks.sh
+++ b/ci/code_checks.sh
@@ -78,8 +78,7 @@ if [[ -z "$CHECK" || "$CHECK" == "docstrings" ]]; then
         pandas.errors.UndefinedVariableError \
         pandas.read_json \
         pandas.io.formats.style.Styler.to_latex \
-        pandas.read_parquet \
-        pandas.DataFrame.to_sql \
+        pandas.read_parquet
     RET=$(($RET + $?)) ; echo $MSG "DONE"
 
 fi
diff --git a/pandas/core/generic.py b/pandas/core/generic.py
index 86c4a99ac052d..14c023f3912a6 100644
--- a/pandas/core/generic.py
+++ b/pandas/core/generic.py
@@ -2997,7 +2997,7 @@ def to_sql(
         3
         >>> from sqlalchemy import text
         >>> with engine.connect() as conn:
-        ...    conn.execute(text("SELECT * FROM users")).fetchall()
+        ...     conn.execute(text("SELECT * FROM users")).fetchall()
         [(0, 'User 1'), (1, 'User 2'), (2, 'User 3')]
 
         An `sqlalchemy.engine.Connection` can also be passed to `con`:
@@ -3014,7 +3014,7 @@ def to_sql(
         >>> df2.to_sql(name='users', con=engine, if_exists='append')
         2
         >>> with engine.connect() as conn:
-        ...    conn.execute(text("SELECT * FROM users")).fetchall()
+        ...     conn.execute(text("SELECT * FROM users")).fetchall()
         [(0, 'User 1'), (1, 'User 2'), (2, 'User 3'),
          (0, 'User 4'), (1, 'User 5'), (0, 'User 6'),
          (1, 'User 7')]
@@ -3025,7 +3025,7 @@ def to_sql(
         ...            index_label='id')
         2
         >>> with engine.connect() as conn:
-        ...    conn.execute(text("SELECT * FROM users")).fetchall()
+        ...     conn.execute(text("SELECT * FROM users")).fetchall()
         [(0, 'User 6'), (1, 'User 7')]
 
         Use ``method`` to define a callable insertion method to do nothing
@@ -3044,7 +3044,7 @@ def to_sql(
         For MySQL, a callable to update columns ``b`` and ``c`` if there's a conflict
         on a primary key.
 
-        >>> from sqlalchemy.dialects.mysql import insert
+        >>> from sqlalchemy.dialects.mysql import insert  # doctest: +SKIP
         >>> def insert_on_conflict_update(table, conn, keys, data_iter):
         ...     # update columns "b" and "c" on primary key conflict
         ...     data = [dict(zip(keys, row)) for row in data_iter]
@@ -3076,7 +3076,7 @@ def to_sql(
         3
 
         >>> with engine.connect() as conn:
-        ...   conn.execute(text("SELECT * FROM integers")).fetchall()
+        ...     conn.execute(text("SELECT * FROM integers")).fetchall()
         [(1,), (None,), (2,)]
         """  # noqa: E501
         from pandas.io import sql