MySQL连接选择两个表之间的最小（日期）和最大（日期）

Question

I have two tables in my database one is for venue and the other is for booking. what I need is a query to select all the venue that are not booked. See below:

table booking has the following fields:

• bk_id

• venue_id as a foreign key from (booking table)

• start_date (as date type ) //indicate when the venue wouldn't be

• available for booking end_date (as date type )//indicating the end date for the booking and from here onward the venue would be available for booking

and venue table has following fields:

• venue_id as a primary key etc.

What I need is to be able to search for all the venue that are not booked. How should I set my mysql query

Answer 1

For venue not booked on particular date use

SELECT * FROM venue WHERE venue_id NOT IN (SELECT venue_id FROM booking WHERE {YOUR_DATE} BETWEEN  start_date AND end_date)

For venues that are never booked

SELECT * FROM venue WHERE venue_id NOT IN (SELECT venue_id FROM booking)