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SET AUTOCOMMIT = 0
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--------------
START TRANSACTION
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DROP DATABASE IF EXISTS `base`
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CREATE DATABASE `base`
DEFAULT CHARACTER SET `latin1`
DEFAULT COLLATE `latin1_general_ci`
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DROP TABLE IF EXISTS `ressource`
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CREATE TABLE `ressource`
(
`rubrique` char(10) NOT NULL,
`credit` decimal(15,2) NOT NULL
) ENGINE=InnoDB
DEFAULT CHARSET=`latin1` COLLATE=`latin1_general_ci`
ROW_FORMAT=COMPRESSED
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INSERT INTO `ressource` (`rubrique`, `credit`) VALUES
('rub 1', 125.15),
('rub 1', 274.85),
('rub 2', 160.00),
('rub 2', 240.00),
('rub 2', 100.00)
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select * from ressource
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+----------+--------+
| rubrique | credit |
+----------+--------+
| rub 1 | 125.15 |
| rub 1 | 274.85 |
| rub 2 | 160.00 |
| rub 2 | 240.00 |
| rub 2 | 100.00 |
+----------+--------+
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commit
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DROP TABLE IF EXISTS `depense`
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CREATE TABLE `depense`
(
`rubrique` char(10) NOT NULL,
`debit` decimal(15,2) NOT NULL
) ENGINE=InnoDB
DEFAULT CHARSET=`latin1` COLLATE=`latin1_general_ci`
ROW_FORMAT=COMPRESSED
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INSERT INTO `depense` (`rubrique`, `debit`) VALUES
('rub 1', 100.00),
('rub 2', 250.00),
('rub 2', 300.00)
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select * from depense
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+----------+--------+
| rubrique | debit |
+----------+--------+
| rub 1 | 100.00 |
| rub 2 | 250.00 |
| rub 2 | 300.00 |
+----------+--------+
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commit
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drop view if exists `vue2`
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create view `vue2` as
select rubrique,
sum(credit) as montant
from ressource
group by rubrique
union
select rubrique,
-sum(debit) as montant
from depense
group by rubrique
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drop view if exists `vue1`
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create view `vue1` as
select rubrique,
sum(montant) as montant
from vue2
group by rubrique
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select * from vue1
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+----------+---------+
| rubrique | montant |
+----------+---------+
| rub 1 | 300.00 |
| rub 2 | -50.00 |
+----------+---------+
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COMMIT
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SET AUTOCOMMIT = 1
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