SQL ORDER String（NumberOrder / CurrentYear）来自两个表
I have TABLE ONE and TABLE TWO and both have a field named "n_inscription"
I have this value saved in both tables as VARCHAR to a MySQL database as "n_inscription" LIKE This (NumberOrder/CurrentYear). Example: 1/2013, 2/2013, 13/2014, ....etc in (TABLE ONE) AND TABLE TWO have these values
1/2014, 2/2014, 5/2013...
I tried this QUERY :
$list_students = array();
$sql_students = $mysqli->query("SELECT * FROM `es_student_infos`
WHERE school_year='".$school_year."'
ORDER BY
CAST(RIGHT(n_inscription, 4) AS UNSIGNED) ASC,
CAST(LEFT(n_inscription, LOCATE('/', n_inscription) - 1) AS UNSIGNED) ASC");
while($data1 = $sql_students->fetch_object()){
$list_students[] = $data1;
}
$sql_students2 = $mysqli->query("SELECT * FROM `es_upgrades`
WHERE school_year='".$school_year."'
ORDER BY
CAST(RIGHT(n_inscription, 4) AS UNSIGNED) ASC,
CAST(LEFT(n_inscription, LOCATE('/', n_inscription) - 1) AS UNSIGNED) ASC");
while($data2 = $sql_students2->fetch_object()){
$list_students[] = $data2;
}
// RETRIEVE DATA :
foreach($list_students AS $student):
............
endforeach;
The problem here in this query is that it SORTs data from the first table and then sorts data from the second table and it gives me result like this:
1/2013| 2/2013 | 13/2014 | 5/2013 | 1/2014 | 2/2014 |
It seems the query starts sorting data from table one and when it finishes sorting data it starts again sort data from TABLE TWO.
I want to sort data from both tables at the same time to give me result like this:
1/2013| 2/2013 | 5/2013 | 1/2014 | 2/2014 | 13/2014 |
and NOT
1/2013| 2/2013 | 13/2014 | 5/2013 | 1/2014 | 2/2014 |
the tables structure:
Table one:
`es_student_infos` (
`id_student` int(11) NOT NULL,
`id_grade` int(11) NOT NULL,
`id_class` int(11) NOT NULL,
`n_inscription` varchar(255) NOT NULL,
`date_inscription` date NOT NULL,
`cne` varchar(255) NOT NULL,
`nom_fr` varchar(255) NOT NULL,
`nom_ar` varchar(255) CHARACTER SET utf8 NOT NULL,
`prenom_fr` varchar(255) NOT NULL,
`prenom_ar` varchar(255) CHARACTER SET utf8 NOT NULL,
`date_naissance` date NOT NULL,
`lieu_naissance_ar` varchar(255) CHARACTER SET utf8 NOT NULL,
`lieu_naissance_fr` varchar(255) NOT NULL,
`tel` varchar(255) NOT NULL,
`sexe` varchar(10) CHARACTER SET utf8 NOT NULL,
`ancien_niveau_scolaire` varchar(255) CHARACTER SET utf8 NOT NULL,
`date_ancienNiveauScolaire` varchar(10) NOT NULL,
`ancienne_ecole` varchar(255) CHARACTER SET utf8 NOT NULL,
`type_ecole` varchar(255) CHARACTER SET utf8 NOT NULL,
`type_inscription` varchar(20) CHARACTER SET utf8 NOT NULL,
`assurance` int(11) NOT NULL,
`mensualite` int(11) NOT NULL,
`nom_tuteur` varchar(255) CHARACTER SET utf8 NOT NULL,
`profession_tuteur` varchar(255) CHARACTER SET utf8 NOT NULL,
`adresse_tuteur` varchar(255) CHARACTER SET utf8 NOT NULL,
`tel_tuteur` varchar(255) NOT NULL,
`remarques` text CHARACTER SET utf8 NOT NULL,
`photo` varchar(255) NOT NULL,
`school_year` varchar(10) NOT NULL,
`cours_type` enum('jour','soir') NOT NULL,
`id_subject` int(11) NOT NULL,
`id_prof_soir` varchar(30) NOT NULL,
`montant_soir` varchar(255) NOT NULL,
`archived` enum('0','1') NOT NULL
Table TWO:
`es_upgrades` (
`id_upgrade` int(11) NOT NULL,
`id_student` int(11) NOT NULL,
`n_inscription` varchar(20) NOT NULL,
`old_id_class` int(11) NOT NULL,
`new_id_class` int(11) NOT NULL,
`status` enum('up','down') NOT NULL,
`school_year` varchar(30) NOT NULL,
`date_inscription` date DEFAULT NULL,
`cne` varchar(255) DEFAULT NULL,
`nom_fr` varchar(255) DEFAULT NULL,
`nom_ar` varchar(255) CHARACTER SET utf8 DEFAULT NULL,
`prenom_fr` varchar(255) DEFAULT NULL,
`prenom_ar` varchar(255) CHARACTER SET utf8 DEFAULT NULL,
`date_naissance` date DEFAULT NULL,
`lieu_naissance_ar` varchar(255) CHARACTER SET utf8 DEFAULT NULL,
`lieu_naissance_fr` varchar(255) DEFAULT NULL,
`tel` varchar(255) DEFAULT NULL,
`sexe` varchar(10) CHARACTER SET utf8 DEFAULT NULL,
`ancien_niveau_scolaire` varchar(255) CHARACTER SET utf8 DEFAULT NULL,
`date_ancienNiveauScolaire` varchar(10) CHARACTER SET utf8 DEFAULT NULL,
`ancienne_ecole` varchar(255) CHARACTER SET utf8 DEFAULT NULL,
`type_ecole` varchar(255) CHARACTER SET utf8 DEFAULT NULL,
`type_inscription` varchar(20) CHARACTER SET utf8 DEFAULT NULL,
`assurance` int(11) DEFAULT NULL,
`mensualite` int(11) DEFAULT NULL,
`nom_tuteur` varchar(255) CHARACTER SET utf8 DEFAULT NULL,
`profession_tuteur` varchar(255) CHARACTER SET utf8 DEFAULT NULL,
`adresse_tuteur` varchar(255) CHARACTER SET utf8 DEFAULT NULL,
`tel_tuteur` varchar(255) CHARACTER SET utf8 DEFAULT NULL,
`remarques` text CHARACTER SET utf8,
`photo` varchar(255) CHARACTER SET utf8 DEFAULT NULL,
`cours_type` enum('jour','soir') CHARACTER SET utf8 DEFAULT NULL,
`id_subject` int(11) DEFAULT NULL,
`archived` enum('0','1') DEFAULT NULL
UNION should works but it will work only with tables with same number of columns or if you specified columns you need (in orther words you cannot use * symbol)
So, if you have the tables like tables:
CREATE TABLE a
(
id SERIAL,
dat DATE,
PRIMARY KEY (id)
);
and
CREATE TABLE b
(
id SERIAL,
dat DATE,
ip VARCHAR(16),
PRIMARY KEY (id)
);
you should use such request
SELECT dat FROM a
UNION
SELECT dat FROM b;
then it should works.
And read this topic (especially second answer (with 7 votes)) it may helpful: Order by descending date - month, day and year