WITH
    toDate('2018-01-01') AS date,
    toDateTime('2018-01-01 00:00:00') AS date_time
SELECT
    addYears(date, 1) AS add_years_with_date,
    addYears(date_time, 1) AS add_years_with_date_time
┌─add_years_with_date─┬─add_years_with_date_time─┐
│          2019-01-01 │      2019-01-01 00:00:00 │
└─────────────────────┴──────────────────────────┘
    toDate('2019-01-01') AS date,
    toDateTime('2019-01-01 00:00:00') AS date_time
SELECT
    subtractYears(date, 1) AS subtract_years_with_date,
    subtractYears(date_time, 1) AS subtract_years_with_date_time
┌─subtract_years_with_date─┬─subtract_years_with_date_time─┐
│               2018-01-01 │           2018-01-01 00:00:00 │
└──────────────────────────┴───────────────────────────────┘
toDayOfMonth():取出日期

subtractDays():日期加减，减天

addMonths():日期加减，加月
toStartOfMonth(toDateTime(CREADATE)) AS __timestamp,
toDayOfMonth(subtractDays(addMonths(__timestamp, 1), 1)),
second

minute