SQL DUMP for example tables used for left join query

student6

id	name	class	sex	house_id
1	John Deo	Four	female	2
2	Max Ruin	Three	male	1
3	Arnold	Three	male	1
4	Krish Star	Four	female	3
5	John Mike	Four	female	2

student_mark

mark_id	student_id	exam_dt	exam	mark
1	2	2017-04-05	Sem1	80
2	2	2017-04-19	Sem2	75
3	1	2017-04-05	Sem1	84
4	1	2017-04-19	Sem2	76
5	3	2017-04-05	Sem1	71
6	3	2017-04-19	Sem2	72
7	1	2017-05-10	Sem1	93
8	1	2017-05-24	Sem2	90
9	2	2017-05-10	Sem1	85
10	2	2017-05-24	Sem2	86
11	3	2017-05-10	Sem1	63
12	3	2017-05-24	Sem2	80
13	1	2017-06-07	Sem1	80
14	1	2017-06-21	Sem2	75
15	2	2017-06-07	Sem1	50
16	2	2017-06-21	Sem2	87
17	3	2017-06-07	Sem1	59
18	3	2017-06-21	Sem2	61
19	4	2017-04-05	Sem1	84
20	4	2017-04-19	Sem2	82
21	5	2017-04-05	Sem1	63
22	5	2017-04-19	Sem2	95
23	4	2017-05-10	Sem1	59
24	4	2017-05-24	Sem2	85
25	5	2017-05-10	Sem1	89
26	5	2017-05-24	Sem2	84
27	4	2017-06-07	Sem1	84
28	4	2017-06-21	Sem2	87
29	5	2017-06-07	Sem1	95
30	5	2017-06-21	Sem2	87

student_house

house_id	h_name
1	King
2	Queen
3	Jack

student_fee

fee_id	id	dt	amount
1	1	2013-01-08	200
2	1	2013-01-10	100
3	2	2013-01-24	120
4	3	2013-02-02	211
5	2	2013-02-07	150
6	3	2013-02-06	135
7	4	2013-02-14	100

CREATE TABLE IF NOT EXISTS `student6` (
  `id` int(2) NOT NULL DEFAULT '0',
  `name` varchar(50) CHARACTER SET utf8 NOT NULL DEFAULT '',
  `class` varchar(10) CHARACTER SET utf8 NOT NULL DEFAULT '',
  `sex` varchar(6) CHARACTER SET utf8 NOT NULL DEFAULT 'male',
  `house_id` int(2) NOT NULL
) ENGINE=InnoDB DEFAULT CHARSET=latin1;

--
-- Dumping data for table `student6`
--

INSERT INTO `student6` (`id`, `name`, `class`, `sex`, `house_id`) VALUES
(1, 'John Deo', 'Four', 'female', 2),
(2, 'Max Ruin', 'Three', 'male', 1),
(3, 'Arnold', 'Three', 'male', 1),
(4, 'Krish Star', 'Four', 'female', 3),
(5, 'John Mike', 'Four', 'female', 2);

-- --------------------------------------------------------

--
-- Table structure for table `student_fee`
--

CREATE TABLE IF NOT EXISTS `student_fee` (
  `fee_id` int(2) NOT NULL AUTO_INCREMENT,
  `id` int(2) NOT NULL,
  `dt` date NOT NULL,
  `amount` int(5) NOT NULL,
  PRIMARY KEY (`fee_id`)
) ENGINE=InnoDB  DEFAULT CHARSET=utf8 AUTO_INCREMENT=8 ;

--
-- Dumping data for table `student_fee`
--

INSERT INTO `student_fee` (`fee_id`, `id`, `dt`, `amount`) VALUES
(1, 1, '2013-01-08', 200),
(2, 1, '2013-01-10', 100),
(3, 2, '2013-01-24', 120),
(4, 3, '2013-02-02', 211),
(5, 2, '2013-02-07', 150),
(6, 3, '2013-02-06', 135),
(7, 4, '2013-02-14', 100);

-- --------------------------------------------------------

--
-- Table structure for table `student_house`
--

CREATE TABLE IF NOT EXISTS `student_house` (
  `house_id` int(2) NOT NULL AUTO_INCREMENT,
  `h_name` varchar(10) NOT NULL,
  PRIMARY KEY (`house_id`)
) ENGINE=InnoDB  DEFAULT CHARSET=latin1 AUTO_INCREMENT=4 ;

--
-- Dumping data for table `student_house`
--

INSERT INTO `student_house` (`house_id`, `h_name`) VALUES
(1, 'King'),
(2, 'Queen'),
(3, 'Jack');

-- --------------------------------------------------------

--
-- Table structure for table `student_mark`
--

CREATE TABLE IF NOT EXISTS `student_mark` (
  `mark_id` int(3) NOT NULL AUTO_INCREMENT,
  `student_id` int(3) NOT NULL,
  `exam_dt` date NOT NULL,
  `exam` varchar(10) NOT NULL,
  `mark` int(3) NOT NULL,
  PRIMARY KEY (`mark_id`)
) ENGINE=InnoDB  DEFAULT CHARSET=latin1 AUTO_INCREMENT=31 ;

--
-- Dumping data for table `student_mark`
--

INSERT INTO `student_mark` (`mark_id`, `student_id`, `exam_dt`, `exam`, `mark`) VALUES
(1, 2, '2017-04-05', 'Sem1', 80),
(2, 2, '2017-04-19', 'Sem2', 75),
(3, 1, '2017-04-05', 'Sem1', 84),
(4, 1, '2017-04-19', 'Sem2', 76),
(5, 3, '2017-04-05', 'Sem1', 71),
(6, 3, '2017-04-19', 'Sem2', 72),
(7, 1, '2017-05-10', 'Sem1', 93),
(8, 1, '2017-05-24', 'Sem2', 90),
(9, 2, '2017-05-10', 'Sem1', 85),
(10, 2, '2017-05-24', 'Sem2', 86),
(11, 3, '2017-05-10', 'Sem1', 63),
(12, 3, '2017-05-24', 'Sem2', 80),
(13, 1, '2017-06-07', 'Sem1', 80),
(14, 1, '2017-06-21', 'Sem2', 75),
(15, 2, '2017-06-07', 'Sem1', 50),
(16, 2, '2017-06-21', 'Sem2', 87),
(17, 3, '2017-06-07', 'Sem1', 59),
(18, 3, '2017-06-21', 'Sem2', 61),
(19, 4, '2017-04-05', 'Sem1', 84),
(20, 4, '2017-04-19', 'Sem2', 82),
(21, 5, '2017-04-05', 'Sem1', 63),
(22, 5, '2017-04-19', 'Sem2', 95),
(23, 4, '2017-05-10', 'Sem1', 59),
(24, 4, '2017-05-24', 'Sem2', 85),
(25, 5, '2017-05-10', 'Sem1', 89),
(26, 5, '2017-05-24', 'Sem2', 84),
(27, 4, '2017-06-07', 'Sem1', 84),
(28, 4, '2017-06-21', 'Sem2', 87),
(29, 5, '2017-06-07', 'Sem1', 95),
(30, 5, '2017-06-21', 'Sem2', 87);

LEFT JOIN ( Basic Query) LEFT JOIN using Multiple Tables

Subhendu Mohapatra

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Zubair	28-03-2018
I am new on SQL i have database which have daily customer balances to takeout potential customer i require query to retrieve data customer account #, maximum balance on which date. Please help Thanks

SQL DUMP of Three tables used for LEFT JOIN query

student6

student_mark

student_house

student_fee

Subhendu Mohapatra