CREATE TABLE people (People_ID NUMBER, Name CLOB, Country CLOB, Is_Male CLOB, Age NUMBER)
CREATE TABLE church (Church_ID NUMBER, Name CLOB, Organized_by CLOB, Open_Date NUMBER, Continuation_of CLOB)
CREATE TABLE wedding (Church_ID NUMBER, Male_ID NUMBER, Female_ID NUMBER, Year NUMBER)

A line chart shows how many churches open each year?
SELECT Open_Date, COUNT(Open_Date) FROM church GROUP BY Open_Date
SELECT "Open_Date", COUNT("Open_Date") FROM "church" GROUP BY "Open_Date"