I use lengths of code similar to this repeatedly in my scripting because I cannot find a shorter way to to compare the MYSQL columns
if ($them['srel1']=="Y" AND $me['Religion']=='Adventist'){$seek11pts=5;}
if ($them['srel2']=="Y" AND $me['Religion']=='Agnostic'){$seek11pts=5;}
if ($them['srel3']=="Y" AND $me['Religion']=='Atheist'){$seek11pts=5;}
if ($them['srel4']=="Y" AND $me['Religion']=='Baptist'){$seek11pts=5;}
if ($them['srel5']=="Y" AND $me['Religion']=='Buddhist'){$seek11pts=5;}
if ($them['srel6']=="Y" AND $me['Religion']=='Caodaism'){$seek11pts=5;}
if ($them['srel7']=="Y" AND $me['Religion']=='Catholic'){$seek11pts=5;}
if ($them['srel8']=="Y" AND $me['Religion']=='Christian'){$seek11pts=5;}
if ($them['srel9']=="Y" AND $me['Religion']=='Hindu'){$seek11pts=5;}
if ($them['srel10']=="Y" AND $me['Religion']=='Iskcon'){$seek11pts=5;}
if ($them['srel11']=="Y" AND $me['Religion']=='Jainism'){$seek11pts=5;}
if ($them['srel12']=="Y" AND $me['Religion']=='Jewish'){$seek11pts=5;}
if ($them['srel13']=="Y" AND $me['Religion']=='Methodist'){$seek11pts=5;}
if ($them['srel14']=="Y" AND $me['Religion']=='Mormon'){$seek11pts=5;}
if ($them['srel15']=="Y" AND $me['Religion']=='Moslem'){$seek11pts=5;}
if ($them['srel16']=="Y" AND $me['Religion']=='Orthodox'){$seek11pts=5;}
if ($them['srel17']=="Y" AND $me['Religion']=='Pentecostal'){$seek11pts=5;}
if ($them['srel18']=="Y" AND $me['Religion']=='Protestant'){$seek11pts=5;}
if ($them['srel19']=="Y" AND $me['Religion']=='Quaker'){$seek11pts=5;}
if ($them['srel20']=="Y" AND $me['Religion']=='Scientology'){$seek11pts=5;}
if ($them['srel21']=="Y" AND $me['Religion']=='Shinto'){$seek11pts=5;}
if ($them['srel22']=="Y" AND $me['Religion']=='Sikhism'){$seek11pts=5;}
if ($them['srel23']=="Y" AND $me['Religion']=='Spiritual'){$seek11pts=5;}
if ($them['srel24']=="Y" AND $me['Religion']=='Taoism'){$seek11pts=5;}
if ($them['srel25']=="Y" AND $me['Religion']=='Wiccan'){$seek11pts=5;}
if ($them['srel26']=="Y" AND $me['Religion']=='Other'){$seek11pts=5;}
EG: if ($them['srel1']=="Y" AND $me['Religion']=='Adventist'){$seek11pts=5;}
I check to seek if the MYSQL column srel1 has a value of Y. if it does then I check to see if the column Religion equals Adventist. If both are true then $seek11pts=5, if they are not both true then nothing happens.
There are 26 srel type columns with either a Y value or null. There are also 26 different values for Religion as you may see. This is but one section of my code. I have multiple HUGE code groupings like this and I'd love to be able to reduce it down to a few lines. I was thinking some kind of array for the religions and another for the numerical endings of the srel columns but I cant get it.
For this current code you can use this:
<?php
$religions = array(1 => 'Adventist','Agnostic','Atheist','Baptist','Buddhist','Caodaism','Catholic','Christian','Hindu','Iskcon','Jainism','Jewish','Methodist','Mormon','Moslem','Orthodox','Pentecostal','Protestant','Quaker','Scientology','Shinto','Sikhism','Spiritual','Taoism','Wiccan','Other');
$count = count($religions) + 1;
for ($i = 1; $i < $count; $i++) {
if ($them["srel$i"]=="Y" && $me['Religion']==$religions[$i]) {
$seek11pts=5;
break;
}
}
While there are ways to accomplish what you ask, you should instead seriously consider restructuring your data.
Better data structure
If your data had a structure more similar to the following:
db.person
+----+------+
| id | name |
+----+------+
| 1 | Nick |
| 2 | Bob |
| 3 | Tony |
+----+------+
PrimaryKey: id
db.religion
+----+---------+
| id | name |
+----+---------+
| 1 | Atheist |
| 2 | Jainism |
| 3 | FSM |
+----+---------+
PrimaryKey: id
db.person_religion
+--------+----------+
| person | religion |
+--------+----------+
| 1 | 2 |
| 2 | 2 |
| 2 | 3 |
| 3 | 1 |
| 3 | 2 |
| 3 | 3 |
+--------+----------+
UniqueIndex: (person,religion)
...everything you're trying to do could be done with simple queries.
SELECT me.id, me.name, meR.name as religion, count(them.id) as matches
FROM person me
LEFT INNER JOIN person_religion meRlookup
ON me.id = meRlookup.person
LEFT INNER JOIN religion meR
ON meRlookup.religion = meR.id
LEFT INNER JOIN person_religion themRlookup
ON meRlookup.religion = themRlookup.religion
LEFT INNER JOIN person them
ON themRlookup.person = them.id
GROUP BY meR.id
I would recommend using laravel or lumen, since these include a "queries generator" that just write a little code (NOTHING SQL) to make queries and that ..
Related
I have two tables and i'm like to query 2 tables to obtain a report.
POSITION
+-------------+---------------+
| position_id | position_name |
+-------------+---------------+
| 1 | E1P1 |
| 2 | E1P2 |
| 3 | E3P3 |
| 4 | E4P4 |
+-------------+---------------+
PEOPLE
+------------+-------------+--------------------+
| people_id | people_name | people_position_id |
+------------+-------------+--------------------+
| 1 | JOHN | 2 |
| 2 | MARK | 4 |
+------------+-------------+--------------------+
QUERY
SELECT position_id, position_name, people_name FROM position
RIGHT JOIN people ON people_position_id = position_id
When I use simple query I get only matched rows, ho to obtain all?
I'm like to obtain this result
+----+----------+--------+
| ID | POSITION | STATUS |
+----+----------+--------+
| 1 | E1P1 | Empty |
| 2 | E1P2 | JOHN |
| 3 | E3P3 | Empty |
| 4 | E4P4 | MARK |
+----+----------+--------+
I would use a left join here:
SELECT
po.position_id,
po.position_name,
COALESCE(pe.people_name, 'EMPTY') AS STATUS
FROM position po
LEFT JOIN people pe
ON po.position_id = pe.people_position_id;
By the way, the reason your current right join attempt is failing is that you have placed the people table on the right side of the join. This means that non matching position records would be discarded. Here is my answer above, rewritten using a right join:
SELECT
po.position_id,
po.position_name,
COALESCE(pe.people_name, 'EMPTY') AS STATUS
FROM people pe
RIGHT JOIN position po
ON po.position_id = pe.people_position_id;
Note carefully that the table order has switched. Most of the time, you will see people using left joins rather than right joins.
I'm new posting here but the community have been my best resource on my projects so far.
I'm a dumb/dummy Mysql "wanna be" and I'm in the middle of a project that is making me go mad.
I have a table from wordpress plugin buddypress that pairs meta_key and meta_values in order to create something akin to a taxonomy. My duty is to use these paired values to implement an advanced group search. Here is the original table:
--------------------------------------------
id | group_id | meta_key | meta_value
--------------------------------------------
1 | 1 | time-zone | Kwajalein
2 | 1 | playstyle | hardcore
3 | 1 | recruiting-status | Open
4 | 1 | ilvl | 115
5 | 1 | main-raid | Final Coil of Bahamut
6 | 1 | voicechat | fc.teamspeak3.com
etc....
Using a view I managed to create a more friendly searchable table for begginers :
gid| time-zone| playstyle | main-raid
--------------------------------------------
1 | | |
1 |Kwajalein | |
1 | | hardcore |
1 | | |
1 | | | Final Coil of Bahamut
1 | | |
And here is the view code:
SELECT distinct
group_id AS 'gid',
IF(meta_key='recruiting-status',meta_value,'') AS 'Recruitment',
IF(meta_key='server',meta_value,'') AS 'server',
IF(meta_key='time-zone',meta_value,'') AS 'tzone',
IF(meta_key='main-raid',meta_value,'') AS 'raid',
IF(meta_key='raid-days',meta_value,'') AS 'days',
IF(meta_key='playstyle',meta_value,'') AS 'playstyle',
IF(meta_key='raid-progression',meta_value,'') AS 'progression',
IF(meta_key='raid-time',meta_value,'') AS 'time',
IF(meta_key='tanker-spot',meta_value,'') AS 'tank',
IF(meta_key='healer-spot',meta_value,'') AS 'healer',
IF(meta_key='melee-dps-spot',meta_value,'') AS 'melee',
IF(meta_key='ranged-dps-spot',meta_value,'') AS 'ranged',
IF(meta_key='magic-dps-spot',meta_value,'') AS 'magic',
IF(meta_key='ilvl',meta_value,'') AS 'ilvl',
IF(meta_key='voicechat',meta_value,'') AS 'voice',
IF(meta_key='voicechatpass',meta_value,'') AS 'voicep',
FROM wpstatic_bp_groups_groupmeta
The point is, I need to merge that result (view) so all the group_id=1 or 2 or 3, etc stand in one single row, like this:
gid| time-zone| playstyle | main-raid
--------------------------------------------
1 |Kwajalein | hardcore | Final Coil of Bahamut
2 |SaoPaulo | regular | Second Coil of Bahamut
etc
Can anyone help me there?
Just surround your IFs in a MAX, or another aggregate function that will capture the non-empty strings (e.g., GROUP_CONCAT), and add a GROUP BY group_id add the end. For example,
SELECT
group_id AS gid,
MAX(IF(meta_key='recruiting-status',meta_value,'')) AS 'Recruitment',
MAX(IF(meta_key='server',meta_value,'')) AS 'server',
...
FROM wpstatic_bp_groups_groupmeta
GROUP BY group_id
I have a database which (for the purposes of this example), has two tables that have a many to many association (with an intermediary table for holding the associations). Here is there structure:
Table A:
+-----+-------+-------+-------+
| aID | aCol1 | aCol2 | aCol3 |
+-----+-------+-------+-------+
| 1 | foo | aoo | doo |
+-----+-------+-------+-------+
| 2 | bar | aar | dar |
+-----+-------+-------+-------+
| 3 | baz | aaz | daz |
+-----+-------+-------+-------+
Table B:
+-----+-------+
| bID | bCol1 |
+-----+-------+
| 1 | alice |
+-----+-------+
| 2 | bob |
+-----+-------+
Association Table:
+-----+-----+
| aID | bID |
+-----+-----+
| 1 | 1 |
+-----+-----+
| 2 | 2 |
+-----+-----+
| 3 | 1 |
+-----+-----+
If I want to search for information by aCol2 LIKE 'aa%' AND the row has an association to bCol1 = 'bob' (i.e. resulting in only row aID = 2), how could I assemble a MySQL Query that could do something similar?
p.s. Sorry for the poor clarity, I am not exactly sure of the wording, but in a nut shell, it is about searching for data from one record that (for the purposes of this) has a 1-* relationship via a connecting table to a number of records, by information that exists in the entire set
SELECT
a.*
FROM
table_b b
INNER JOIN associations ab ON (b.b_id = ab.b_id)
INNER JOIN table_a a ON (ab.a_id = a.a_id)
WHERE
b.col_1 = 'bob'
AND a.col_2 LIKE 'aa%'
It's been awhile, but I believe this should work:
SELECT
*
FROM
A,
B,
associations
WHERE
A.aCol2 LIKE 'aa%' AND
A.aID = associations.aID AND
associations.bID = B.bID
You have to do 2 inner joins to combine the 3 tables.
Preface: Yes i realize this is bad design, but i can't change this.
Question
I have a customers table, and within that a field 'products'. Here is an example of what is in a sample customers products field:
36;40;362
Each of those numbers reference a record from the products table. I'm trying to do a
(SELECT group_concat(productName) from products where productID=???)
but am having trouble with the delimiters. I know how to remove the semi colons, and have tried 'where INSTR' or IN but am having no luck.
Is the best approach to return the whole field to PHP and then explode / parse there?
You can use FIND_IN_SET function in MySQL.
You just need to replace semicolons with a comma and the use it in your query:
SELECT group_concat(productName)
FROM products
WHERE FIND_IN_SET(productID, ???) > 0
Just remember that ??? should be comma-separated!
Like you said, this isn't the way to do it. But since it's an imperfect world:
Assuming a database structure like so:
+-PRODUCTS---------+ +-CUSTOMERS---------+------------+
| ID | productName | | ID | customerName | productIDs |
+----+-------------+ +----+--------------+------------+
| 1 | Foo | | 1 | Alice | 1;2 |
+----+-------------+ +----+--------------+------------+
| 2 | Bar | | 2 | Bob | 2;3 |
+----+-------------+ +----+--------------+------------+
| 3 | Baz | | 3 | Charlie | |
+----+-------------+ +----+--------------+------------+
Then a query like this:
SELECT customers.*,
GROUP_CONCAT(products.id) AS ids,
GROUP_CONCAT(productName) AS names
FROM customers
LEFT JOIN products
ON FIND_IN_SET(products.id, REPLACE(productIDs, ";", ","))
GROUP BY customers.id
Would return:
+-RESULT------------+------------+-----+---------+
| ID | customerName | productIDs | ids | names |
+----+--------------+------------+-----+---------+
| 1 | Alice | 1;2 | 1,2 | Foo,Bar |
+----+--------------+------------+-----+---------+
| 2 | Bob | 2;3 | 1,2 | Bar,Baz |
+----+--------------+------------+-----+---------+
| 3 | Charlie | | 1,2 | NULL |
+----+--------------+------------+-----+---------+
FIND_IN_SET( search_value, comma_separated_list ) searches for the value in the given comma separated string. So, you need to replace the semicolons with commas, which is obviously what REPLACE() does. The return value of this function is the position where it found the first match, so for example:
SELECT FIND_IN_SET(3, '1,3,5') = 2
SELECT FIND_IN_SET(5, '1,3,5') = 3
SELECT FIND_IN_SET(7, '1,3,5') = NULL
I want my users to be able to make a favourite list.
I have two tables in a database in mySQL. One stores information about businesses and the other stores the unique user ids as well as the ids from the first table that the user has marked a favourite.
Table 1
<pre>
ID | NAME | EMAIL | PHONE |
1 | Joe | a#mail.com | 25634565 |
2 | John | b#mail.com | 43634565 |
3 | Jack | c#mail.com | 65634565 |
4 | James| d#mail.com | 43634565 |
5 | Julie| e#mail.com | 65634565 |
...
</pre>
Table 2
<pre>
USERID | FAV1 | FAV2 | FAV3 | FAV...
2565325489 | 1 | 3 | 5 |
8596854785 | 3 | 2 | NULL |
2356256263 | 5 | NULL | NULL |
...
</pre>
The output I want for a user (in this example the first in table2):
<pre>
Joe | a#mail.com | 25634565 |
Jack | c#mail.com | 65634565 |
Julie| e#mail.com | 65634565 |
</pre>
I have looked into JOIN LEFT and minus query calls, but I just can't make it work. I have a basic understanding of mySQL and PHP, but not a lot.
I would highly appreciate any help with what approach to take.
Ps. If there are better ways to structures my databases, I would love to know.
I'd use a table with two fields - userID and fav - make one entry for each entry. And then...
SELECT table1.name, table1.email, table1.phone FROM table1,table2 WHERE table2.fav = table1.id AND table2.userid = 2565325489
Select * from table1 InnerJoin (Select * from table2) as t4 on table1.ID=t4.FAV1
$result = mysqli_query('SELECT name,email,phone FROM t1 table1 LEFT JOIN table2 t2 ON t1.ID = t2.fav1');
//iterate the results
while ($row = mysqli_fetch_array($result))
{
echo $row['name']." ".$row['email']." "$row['phone'];
}