如何在MYSQL中使用SELECT语句插入数据？

我需要找到每位乘客一天的总预订量。例如：

+---------+-------------+-------+
| name    | departDate  | TOTAL |
+---------+-------------+-------+
| Douglas | 2019/05/26  |     2 |
| Mike    | 2020-02-12  |     1 |

除道格拉斯在同一天有两个航班外，所有乘客将返回1个航班。然后使用这些信息，我必须为当天有2个航班的乘客创建一个新的预订（道格拉斯）

现在我正在接收以下输出：

name       departDate            TOTAL
'Douglas' '2019-05-10 22:05:00', '1'
'Ben',    '2019-04-23 07:05:00', '1'
'Jean',   '2019-04-23 07:05:00', '1'
'Douglas' '2019-05-26 09:35:00', '1'
'Ben',    '2019-05-18 06:00:00', '1'
'Mike',   '2019-05-18 06:00:00', '1'
'Josef',  '2019-05-05 06:05:00', '1'
'Douglas' '2019-05-26 22:05:00', '1'
'Harry',  '2019-04-23 07:10:00', '1'
'Will',   '2019-05-10 08:45:00', '1'
'Ben',    '2019-05-10 08:45:00', '1'
'Mike',   '2019-05-10 08:45:00', '1'
'Alex',   '2019-04-24 07:10:00', '1'
'Duke',   '2019-04-24 07:10:00', '1'
'Alex',   '2019-04-26 13:10:00', '1'

name       departDate   TOTAL
'Douglas' '2019-05-10', '1'
'Ben',    '2019-04-23', '1'
'Jean',   '2019-04-23', '1'
'Douglas' '2019-05-26', '2'
'Ben',    '2019-05-18', '1'
'Mike',   '2019-05-18', '1'
'Josef',  '2019-05-05', '1'
'Harry',  '2019-04-23', '1'
'Will',   '2019-05-10', '1'
'Ben',    '2019-05-10', '1'
'Mike',   '2019-05-10', '1'
'Alex',   '2019-04-24', '1'
'Duke',   '2019-04-24', '1'
'Alex',   '2019-04-26', '1'

当我试图达到此输出时：

name       departDate            TOTAL
'Douglas' '2019-05-10 22:05:00', '1'
'Ben',    '2019-04-23 07:05:00', '1'
'Jean',   '2019-04-23 07:05:00', '1'
'Douglas' '2019-05-26 09:35:00', '1'
'Ben',    '2019-05-18 06:00:00', '1'
'Mike',   '2019-05-18 06:00:00', '1'
'Josef',  '2019-05-05 06:05:00', '1'
'Douglas' '2019-05-26 22:05:00', '1'
'Harry',  '2019-04-23 07:10:00', '1'
'Will',   '2019-05-10 08:45:00', '1'
'Ben',    '2019-05-10 08:45:00', '1'
'Mike',   '2019-05-10 08:45:00', '1'
'Alex',   '2019-04-24 07:10:00', '1'
'Duke',   '2019-04-24 07:10:00', '1'
'Alex',   '2019-04-26 13:10:00', '1'

name       departDate   TOTAL
'Douglas' '2019-05-10', '1'
'Ben',    '2019-04-23', '1'
'Jean',   '2019-04-23', '1'
'Douglas' '2019-05-26', '2'
'Ben',    '2019-05-18', '1'
'Mike',   '2019-05-18', '1'
'Josef',  '2019-05-05', '1'
'Harry',  '2019-04-23', '1'
'Will',   '2019-05-10', '1'
'Ben',    '2019-05-10', '1'
'Mike',   '2019-05-10', '1'
'Alex',   '2019-04-24', '1'
'Duke',   '2019-04-24', '1'
'Alex',   '2019-04-26', '1'

我知道2019/05/26年我不能在道格拉斯旁边得到2张，因为COUNT（）将当天的每个预订作为单独的预订（不是在同一天）进行读取，因为时间不同

我想弄清楚的是如何计算每天的总预订量，不包括那些日子的时间

这是表格：

CREATE TABLE BOOKING (
name            VARCHAR(30),        /* Passenger's name*/
DOB             DATE,               /* Passenger's DOB */
flightNumber    CHAR(6),            /* Flight number */
departAirport   VARCHAR(50),        /* Departure airport */
departTime      DATETIME,           /* Departure date and time */
class           CHAR(10),           /* class of the seat */
bookingTime     DATETIME    NOT NULL,   /* Booking time */
CONSTRAINT BOOKING_PK PRIMARY KEY(name, DOB, flightNumber, departAirport, departTime, class, bookingTime),
CONSTRAINT BOOKING_FK1 FOREIGN KEY(name, DOB) REFERENCES PASSENGER(name, DOB),
CONSTRAINT BOOKING_FK2 FOREIGN KEY(flightNumber, departAirport, departTime, class) REFERENCES SEATING(flightNumber, departAirport, departTime, class));

以下是insert语句：

INSERT INTO BOOKING VALUES ('Mike', STR_TO_DATE('10/08/1982', '%d/%m/%Y'), 'QF8764', 'SYD', STR_TO_DATE('10/05/2019 08:45', '%d/%m/%Y %H:%i'), 'ECONOMY', STR_TO_DATE('1/05/2019 10:35', '%d/%m/%Y %H:%i'));
INSERT INTO BOOKING VALUES ('Mike', STR_TO_DATE('10/08/1982', '%d/%m/%Y'), 'QF322', 'AKL', STR_TO_DATE('18/05/2019 06:00', '%d/%m/%Y %H:%i'), 'ECONOMY', STR_TO_DATE('1/05/2019 10:35', '%d/%m/%Y %H:%i'));
INSERT INTO BOOKING VALUES ('Jean', STR_TO_DATE('12/05/1988', '%d/%m/%Y'), 'JQ402', 'SYD', STR_TO_DATE('23/04/2019 07:05', '%d/%m/%Y %H:%i'), 'ECONOMY', STR_TO_DATE('1/04/2019 12:05', '%d/%m/%Y %H:%i'));
INSERT INTO BOOKING VALUES ('Alex', STR_TO_DATE('21/07/1992', '%d/%m/%Y'), 'VA505', 'SYD', STR_TO_DATE('24/04/2019 07:10', '%d/%m/%Y %H:%i'), 'BUSINESS', STR_TO_DATE('10/04/2019 09:35', '%d/%m/%Y %H:%i'));
INSERT INTO BOOKING VALUES ('Alex', STR_TO_DATE('21/07/1992', '%d/%m/%Y'), 'VA523', 'SYD', STR_TO_DATE('26/04/2019 13:10', '%d/%m/%Y %H:%i'), 'BUSINESS', STR_TO_DATE('10/04/2019 09:35', '%d/%m/%Y %H:%i'));
INSERT INTO BOOKING VALUES ('Ben', STR_TO_DATE('22/04/1994', '%d/%m/%Y'), 'QF8764', 'SYD', STR_TO_DATE('10/05/2019 08:45', '%d/%m/%Y %H:%i'), 'ECONOMY', STR_TO_DATE('25/04/2019 11:35', '%d/%m/%Y %H:%i'));
INSERT INTO BOOKING VALUES ('Ben', STR_TO_DATE('22/04/1994', '%d/%m/%Y'), 'QF322', 'AKL', STR_TO_DATE('18/05/2019 06:00', '%d/%m/%Y %H:%i'), 'ECONOMY', STR_TO_DATE('27/04/2019 16:15', '%d/%m/%Y %H:%i'));
INSERT INTO BOOKING VALUES ('Ben', STR_TO_DATE('22/04/1994', '%d/%m/%Y'), 'JQ402', 'SYD', STR_TO_DATE('23/04/2019 07:05', '%d/%m/%Y %H:%i'), 'ECONOMY', STR_TO_DATE('17/04/2019 14:30', '%d/%m/%Y %H:%i'));
INSERT INTO BOOKING VALUES ('Duke', STR_TO_DATE('28/03/1974', '%d/%m/%Y'), 'VA505', 'SYD', STR_TO_DATE('24/04/2019 07:10', '%d/%m/%Y %H:%i'), 'BUSINESS', STR_TO_DATE('20/04/2019 13:30', '%d/%m/%Y %H:%i'));
INSERT INTO BOOKING VALUES ('Josef', STR_TO_DATE('27/11/1982', '%d/%m/%Y'), 'QF401', 'SYD', STR_TO_DATE('05/05/2019 06:05', '%d/%m/%Y %H:%i'), 'ECONOMY', STR_TO_DATE('22/04/2019 10:30', '%d/%m/%Y %H:%i'));
INSERT INTO BOOKING VALUES ('Harry', STR_TO_DATE('16/07/1990', '%d/%m/%Y'), 'QF860', 'SYD', STR_TO_DATE('23/04/2019 07:10', '%d/%m/%Y %H:%i'), 'FIRST', STR_TO_DATE('21/04/2019 10:30', '%d/%m/%Y %H:%i'));
INSERT INTO BOOKING VALUES ('Will', STR_TO_DATE('20/10/1977', '%d/%m/%Y'), 'QF8764', 'SYD', STR_TO_DATE('10/05/2019 08:45', '%d/%m/%Y %H:%i'), 'BUSINESS', STR_TO_DATE('25/04/2019 15:30', '%d/%m/%Y %H:%i'));
INSERT INTO BOOKING VALUES ('Douglas', STR_TO_DATE('20/11/1967', '%d/%m/%Y'), 'QF497', 'SYD', STR_TO_DATE('26/05/2019 22:05', '%d/%m/%Y %H:%i'), 'ECONOMY', STR_TO_DATE('21/04/2019 12:30', '%d/%m/%Y %H:%i'));
INSERT INTO BOOKING VALUES ('Douglas', STR_TO_DATE('20/11/1967', '%d/%m/%Y'), 'CA2842', 'PEK', STR_TO_DATE('10/05/2019 22:05', '%d/%m/%Y %H:%i'), 'ECONOMY', STR_TO_DATE('21/04/2019 12:30', '%d/%m/%Y %H:%i'));
INSERT INTO BOOKING VALUES ('Douglas', STR_TO_DATE('20/11/1967', '%d/%m/%Y'), 'QF129', 'SYD', STR_TO_DATE('26/05/2019 09:35', '%d/%m/%Y %H:%i'), 'ECONOMY', STR_TO_DATE('01/05/2019 10:30', '%d/%m/%Y %H:%i'));

---

您可以使用

日期

功能：

select name, date(departtime) as date, count(*)
from booking
group by name, date;

（不是在同一天）因为时间不同

如何添加SUBSTR trim以仅提取YYYY-MM-DD格式

#SQLite

#SQLSERVER