I am working with an Employee database in Mysql. My Db contains the following tables
mysql> describe edept;
+-------+-------------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+-------+-------------+------+-----+---------+-------+
| id | int(11) | NO | PRI | NULL | |
| dept | varchar(20) | NO | | NULL | |
+-------+-------------+------+-----+---------+-------+
mysql>describe esal;
+-------+---------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+-------+---------+------+-----+---------+-------+
| id | int(11) | NO | PRI | NULL | |
| basic | int(11) | NO | | NULL | |
| pf | int(11) | NO | | NULL | |
+-------+---------+------+-----+---------+-------+
mysql> describe edesig;
+-------+-------------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+-------+-------------+------+-----+---------+-------+
| id | int(11) | NO | PRI | NULL | |
| desig | varchar(20) | NO | | NULL | |
+-------+-------------+------+-----+---------+-------+
mysql> select * from edetails inner join edept on edetails.dept=edept.id;
+----+--------+-----+------+-------+-------+----+----+------------------+
| id | name | age | dept | desig | basic | pf | id | dept |
+----+--------+-----+------+-------+-------+----+----+------------------+
| 1 | swetha | 21 | 3 | 2 | 2 | 2 | 3 | Business Process |
+----+--------+-----+------+-------+-------+----+----+------------------+
mysql> describe edetails;
+-------+-------------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+-------+-------------+------+-----+---------+-------+
| id | int(11) | NO | PRI | NULL | |
| name | varchar(20) | NO | | NULL | |
| age | int(11) | NO | | NULL | |
| dept | int(11) | NO | MUL | NULL | |
| desig | int(11) | YES | MUL | NULL | |
| basic | int(11) | NO | MUL | NULL | |
| pf | int(11) | NO | MUL | NULL | |
+-------+-------------+------+-----+---------+-------+
I have to get values for dept,desig,basic,pf from the tables edept.dept,edesig.desig,esal.basic,esal.pf respectively.
I used foreign keys for all the fields for which i have to retrieve values from other tables.And i tried a sample inner join query. but i got the output as follows:
mysql> select * from edetails inner join edept on edetails.dept=edept.id;
+----+--------+-----+------+-------+-------+----+----+------------------+
| id | name | age | dept | desig | basic | pf | id | dept |
+----+--------+-----+------+-------+-------+----+----+------------------+
| 1 | swetha | 21 | 3 | 2 | 2 | 2 | 3 | Business Process |
+----+--------+-----+------+-------+-------+----+----+------------------+
My edept table contains the following:
mysql> select * from edept;
+----+------------------+
| id | dept |
+----+------------------+
| 3 | Business Process |
+----+------------------+
How can i eliminate duplicate columns. i need the value "business process" in the dept field of the edept table
Try this::
select
edetails.id,
edetails.name,
edetails.age,
edetails.dept,
edesig.desig,
edetails.basic,
edetails.pf,
edept.dept
from edetails
inner join edept on edetails.dept=edept.id
INNER JOIN edesig on edesig.id=edetails.desig
Related
I want to be able to select classes that are starting on or after the next two hours up until the end of tomorrow's date but I am not sure of how to do this.
My current sql is below, I have only been able to select classes that are after today's date and after the current time. I want to be able to only return classes that start two hours after now up until the end of tomorrows date.
I am able to pass the current date and current time into my node.js function that will construct the sql statement. Also, I have access to moment.js library if I need to use this I could.
Any help would be appreciated.
SELECT DISTINCT b.name
, a.time
FROM class a
Inner join (SELECT class_id, count(clientid)
FROM bookings
GROUP BY class_id
HAVING count(clientid) < 10) as openClasses on
a.class_id = openClasses.class_id
JOIN class_detail b
ON a.class_id = b.id
JOIN branch c
ON a.branch_id = c.id
WHERE c.level <= ( SELECT d.level
FROM client d
WHERE d.facebook_id = 'xxxxxx'
)
AND a.date = '2016-08-17'
AND a.time >= '13.00.00';
My tables are as follows:
BOOKINGS
+-----------+-------------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+-----------+-------------+------+-----+---------+-------+
| id | bigint(20) | NO | PRI | NULL | |
| CLIENT_ID | int(11) | NO | | NULL | |
| CLASS_ID | int(11) | NO | | NULL | |
| STATUS | varchar(10) | NO | | NULL | |
+-----------+-------------+------+-----+---------+-------+
mysql> show fields from BRANCH;
+---------------------+-------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+---------------------+-------------+------+-----+---------+----------------+
| id | int(10) | NO | PRI | NULL | auto_increment |
| NAME | char(50) | NO | | NULL | |
| CONTACT_NO | char(50) | YES | | NULL | |
| MAP_IMG_PATH | char(200) | YES | | NULL | |
| ADDRESS | char(200) | YES | | NULL | |
| LEVEL | int(2) | NO | | NULL | |
| LOCATION | int(10) | YES | | NULL | |
| SECTOR_NAME | varchar(45) | YES | | NULL | |
| SECTOR_MAP_IMG_PATH | char(200) | YES | | NULL | |
+---------------------+-------------+------+-----+---------+----------------+
mysql> show fields from CLIENT;
+--------------+-------------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+--------------+-------------+------+-----+---------+-------+
| id | int(10) | NO | PRI | NULL | |
| NAME | char(50) | NO | | NULL | |
| DOB | int(8) | NO | | NULL | |
| LOCAL_BRANCH | int(10) | YES | | NULL | |
| FACEBOOK_ID | char(50) | NO | | NULL | |
| START_DATE | int(8) | NO | | NULL | |
| EMAIL | char(50) | YES | | NULL | |
| PIN | int(4) | YES | | NULL | |
| END_DATE | int(8) | NO | | NULL | |
| LEVEL | int(2) | YES | | NULL | |
| TEL | varchar(20) | YES | | NULL | |
+--------------+-------------+------+-----+---------+-------+
mysql> show fields from CLASS_DETAIL;
+--------------+--------------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+--------------+--------------+------+-----+---------+-------+
| id | int(10) | NO | PRI | NULL | |
| NAME | char(50) | NO | | NULL | |
| DESCRIPTION | char(200) | NO | | NULL | |
| CATEGORY | varchar(4) | YES | | NULL | |
| ACHIEVE_TYPE | char(200) | YES | | NULL | |
| IMG_M | varchar(200) | YES | | NULL | |
| IMG_F | varchar(200) | YES | | NULL | |
+--------------+--------------+------+-----+---------+-------+
mysql> show fields from CLASS;
+-----------+---------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+-----------+---------+------+-----+---------+----------------+
| id | int(11) | NO | PRI | NULL | auto_increment |
| CLASS_ID | int(10) | YES | | NULL | |
| BRANCH_ID | int(10) | NO | | NULL | |
| DURATION | int(3) | YES | | NULL | |
| DATE | date | NO | | NULL | |
| TIME | time | NO | | NULL | |
| STATUS | char(1) | NO | | NULL | |
+-----------+---------+------+-----+---------+----------------+
7 rows in set (0.11 sec)
I have the following 2 tables (student and attendance):
mysql> describe student;
+----------------------+--------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+----------------------+--------------+------+-----+---------+----------------+
| student_id | int(11) | NO | PRI | NULL | auto_increment |
| student_email | varchar(255) | YES | | NULL | |
| student_phone_number | varchar(255) | YES | | NULL | |
| parent_first_name | varchar(255) | NO | | NULL | |
| parent_last_name | varchar(255) | NO | | NULL | |
| parent_email | varchar(255) | NO | | NULL | |
| parent_phone_number | varchar(255) | NO | | NULL | |
| first_name | varchar(255) | NO | | NULL | |
| last_name | varchar(255) | NO | | NULL | |
| days_absent | int(11) | YES | | NULL | |
| days_tardy | int(11) | YES | | NULL | |
| class_id | int(11) | NO | MUL | NULL | |
+----------------------+--------------+------+-----+---------+----------------+
mysql> describe attendance;
+-----------------+------------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+-----------------+------------+------+-----+---------+-------+
| student_id | int(11) | NO | PRI | NULL | |
| class_id | int(11) | NO | PRI | NULL | |
| attendance_date | date | NO | PRI | NULL | |
| absent | tinyint(1) | YES | | NULL | |
| tardy | tinyint(1) | YES | | NULL | |
| note | text | YES | | NULL | |
+-----------------+------------+------+-----+---------+-------+
I want to check the attendance and email of all the children who are absent or tardy for the day. Is there a SQL statement I can use that can, for example, select the students from attendance with an absent/tardy value = 1, then using that student_id specified in the attendance table, pull all the student info from the student table where attendance.student_id = student.student_id?
just try exists
select student_email,student_phone_number from student std
where exists(
select 1 from attendance atd where std.student_id = atd.student_id
and (atd.absent =1 or atd.tardy =1)
)
just make sure you select all the info from student table and exists all the filter in attendance talbe. the condition is student_id.
Also if you need info from attendance talbe, then use join.
I have 3 tables person, account and subscription. Account belongs to Person as one to many and Account and Subscription are many to many.I need a sql which can select data from three tables.-
Person Tables
+----------------------------+--------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+----------------------------+--------------+------+-----+---------+----------------+
| id | int(11) | NO | PRI | NULL | auto_increment |
| username | varchar(128) | NO | | NULL | |
| password | varchar(128) | NO | | NULL | |
| account_id | int(11) | NO | | NULL | |
+----------------------------+---------------+------+---------------+----------------+
Account table
+--------------+--------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+--------------+--------------+------+-----+---------+----------------+
| id | int(11) | NO | PRI | NULL | auto_increment |
| yearly_renew | tinyint(1) | NO | | NULL | |
| date_joined | date | NO | | NULL | |
| last_renewed | datetime | YES | | NULL | |
| signup | tinyint(1) | NO | | NULL | |
| reason | varchar(100) | YES | | NULL | |
| yearly_total | int(11) | YES | | NULL | |
| total | int(11) | YES | | NULL | |
+--------------+--------------+------+-----+---------+----------------+
Account-Subscription table
+-----------------+---------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+-----------------+---------+------+-----+---------+----------------+
| id | int(11) | NO | PRI | NULL | auto_increment |
| account_id | int(11) | NO | MUL | NULL | |
| subscription_id | int(11) | NO | MUL | NULL | |
+-----------------+---------+------+-----+---------+----------------+
Subscription table
+-------------------+--------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+-------------------+--------------+------+-----+---------+----------------+
| id | int(11) | NO | PRI | NULL | auto_increment |
| subscription_type | varchar(150) | YES | | NULL | |
| hold | tinyint(1) | NO | | NULL | |
| start_date | date | YES | | NULL | |
| end_date | date | YES | | NULL | |
| amount_paid | double | YES | | NULL | |
| date_paid | date | YES | | NULL | |
| transaction_id | int(11) | YES | | NULL | |
| free | tinyint(1) | NO | | NULL | |
+-------------------+--------------+------+-----+---------+----------------+
Expecting output in a single query -
OUTPUT
+-----------+------------+--------------+
| person.id | account.id | subscription.id |
+-----------+------------+--------------+
| 10 | 11 | 20 |
| 15 | 32 | 45 |
| 23 | 43 | null |
+--------+---------+-----------------+
try this. it may works properly...
SELECT p.Id AS person.id
,p.account_id AS account.id
,acsub.subscription_id as subscription.id
FROM Person AS p
LEFT JOIN Account-Subscription AS acsub ON p.account_id=acsub.account_id
SELECT p.Id AS person.id
,p.account_id AS account.id
,acsub.subscription_id as subscription.id
FROM Person AS p
INNER JOIN
Account-Subscription AS acsub ON p.account_id=acsub.account_id
Can anyone help me find the minimum student action per course? Listed like this:
+-------------+--------------------------+
| Course | Lowest Action |
+-------------+--------------------------+
| Maths Y1 | |
| English C | |
| Science Y1 | |
for all users, even if they are not in the log table, without a subquery? My thanks to #luckylwk for assistance with my initial query. I have a solution with a subquery but want to put this into a variable for a much large query.
SELECT
COUNT(tbl_log.action)
lastname,
c.fullname,
FROM tbl_log
JOIN tbl_user ON tbl_log.userid = tbl_user.id
JOIN tbl_course ON tbl_log.course = tbl_course.id
GROUP BY tbl_log.userid, tbl_log.course
LOG TABLE
+-------------+---------------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+-------------+---------------------+------+-----+---------+----------------+
| id | | NO | PRI | NULL | auto_increment |
| time | | NO | | NULL | |
| userid | | NO | | NULL | |
| course | | NO | | NULL | |
| action | | NO | | NULL | |
+-------------+---------------------+------+-----+---------+----------------+
USER Table
+--------------+---------------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+--------------+---------------------+------+-----+---------+----------------+
| id | | NO | PRI | NULL | auto_increment |
| username | | NO | | NULL | |
| userpassword | | NO | | NULL | |
| lastname | | NO | | NULL | |
| firstname | | NO | | NULL | |
+--------------+---------------------+------+-----+---------+----------------+
COURSE table
+--------------+---------------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+--------------+---------------------+------+-----+---------+----------------+
| id | | NO | PRI | NULL | auto_increment |
| category | | NO | | NULL | |
| fullname | | NO | | NULL | |
| shortname | | NO | | NULL | |
+--------------+---------------------+------+-----+---------+----------------+
I link the users together via the enrolment and context tables.
Try:
SELECT
tbl_course.course_name,
MIN(tbl_log.action) as Lowest_Action
FROM tbl_log
JOIN tbl_user ON tbl_log.userid = tbl_user.id
JOIN tbl_course ON tbl_log.course = tbl_course.id
GROUP BY tbl_course.course_name
See Fiddle Demo
I have these tables :
mysql> desc mod_asterisk_booking;
+---------------+------------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+---------------+------------------+------+-----+---------+----------------+
| id | int(10) unsigned | NO | PRI | NULL | auto_increment |
| uid | int(10) unsigned | NO | | NULL | |
| server_id | int(10) unsigned | NO | | NULL | |
| date_call | datetime | NO | | NULL | |
| participants | int(10) unsigned | NO | | NULL | |
| ... |
+---------------+------------------+------+-----+---------+----------------+
mysql> desc mod_asterisk_servers;
+-------------------+------------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+-------------------+------------------+------+-----+---------+----------------+
| id | int(10) unsigned | NO | PRI | NULL | auto_increment |
| name | varchar(32) | NO | | NULL | |
| channels_capacity | int(10) unsigned | NO | | NULL | |
| ... |
+-------------------+------------------+------+-----+---------+----------------+
mysql> desc mod_asterisk_server_phones;
+------------------+------------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+------------------+------------------+------+-----+---------+----------------+
| id | int(10) unsigned | NO | PRI | NULL | auto_increment |
| server_id | int(10) unsigned | NO | | NULL | |
| phone_number | varchar(15) | NO | | NULL | |
| phone_alias | varchar(15) | NO | | NULL | |
| extension | int(10) unsigned | NO | | NULL | |
| is_toll_free | tinyint(1) | NO | | 0 | |
| is_allow_foreign | tinyint(1) | NO | | 0 | |
+------------------+------------------+------+-----+---------+----------------+
The goal is to fetch a server (from mod_asterisk_servers) that has the enough channels available for a given date interval. This query
SELECT s.*,
s.`channels_capacity` - IFNULL(SUM(b.`participants`), 0) as 'channels_available'
FROM `mod_asterisk_servers` as s
LEFT JOIN `mod_asterisk_booking` as b ON (b.server_id=s.id AND (b.date_call BETWEEN '2011-07-30 15:15:00' AND '2011-07-30 17:15:00'))
GROUP BY s.id
ORDER BY 'channels_available' DESC;
could return something like :
+----+-------------+-----+------------------+--------------------+
| id | name | ... |channels_capacity | channels_available |
+----+-------------+-----+------------------+--------------------+
| 1 | Test server | ... | 150 | 140 |
+----+-------------+-----+------------------+--------------------+
Now, I'd like to add some columns to this query; notably the phone numbers associated with each server found. A phone number may have these combination :
local phone number (is_toll_free=0 AND is_allow_foreign=0)
toll free number, limited to a given region (is_toll_free=1 AND is_allow_foreign=0)
toll free number, allowing an "extended" region (is_toll_free=1 AND is_allow_foreign=1)
I tried this query
SELECT s.*,
s.`channels_capacity` - IFNULL(SUM(b.`participants`), 0) as 'channels_available',
count(p1.phone_number) as 'local_phones',
count(p2.phone_number) as 'toll_free_phones',
count(p3.phone_number) as 'allow_foreign_phones'
FROM `mod_asterisk_servers` as s
LEFT JOIN `mod_asterisk_booking` as b ON (b.server_id=s.id AND (b.date_call BETWEEN '2011-07-30 15:15:00' AND '2011-07-30 17:15:00'))
LEFT JOIN `mod_asterisk_server_phones` as p1 ON (p1.server_id=s.id AND p1.is_toll_free=0 AND p1.is_allow_foreign=0)
LEFT JOIN `mod_asterisk_server_phones` as p2 ON (p2.server_id=s.id AND p2.is_toll_free=1 AND p2.is_allow_foreign=0)
LEFT JOIN `mod_asterisk_server_phones` as p3 ON (p3.server_id=s.id AND p3.is_toll_free=1 AND p3.is_allow_foreign=1)
ORDER BY 'channels_available' DESC;
but it returns
+----+-------------+-----+-------------------+--------------------+--------------+------------------+----------------------+
| id | name | ... | channels_capacity | channels_available | local_phones | toll_free_phones | allow_foreign_phones |
+----+-------------+-----+-------------------+--------------------+--------------+------------------+----------------------+
| 1 | Test server | ... | 150 | 140 | 2 | 2 | 2 |
+----+-------------+-----+-------------------+--------------------+--------------+------------------+----------------------+
even though there are only three numbers for that server :
mysql> select * from mod_asterisk_server_phones where server_id = 1;
+----+-----------+----------------+-------------+-----------+--------------+------------------+
| id | server_id | phone_number | phone_alias | extension | is_toll_free | is_allow_foreign |
+----+-----------+----------------+-------------+-----------+--------------+------------------+
| 1 | 1 | XXX-XXX-XXXX | | XXXX | 0 | 0 |
| 2 | 1 | 1-800-XXX-XXXX | | XXXX | 1 | 0 |
| 3 | 1 | 1-800-XXX-XXXX | | XXXX | 1 | 1 |
+----+-----------+----------------+-------------+-----------+--------------+------------------+
Maybe someone with better understanding of SQL can help me figure out this one?
Thanks!
Try count(DISTINCT p1.phone_number) instead of count(p1.phone_number) (and the same for p2,p3). And don't forget the proper GROUP BY