Reviews Count for each user [duplicate] - php

I have a SQL statement which requests data from the database.
SELECT `ID`, `To`, `Poster`, `Content`, `Time`, ifnull(`Aura`,0) as `Aura` FROM (
SELECT * FROM (
SELECT DISTINCT * FROM messages m
INNER JOIN
(
SELECT Friend2 as Friend FROM friends WHERE Friend1 = '1'
UNION ALL
SELECT Friend1 as Friend FROM friends WHERE Friend2 = '1'
) friends ON m.Poster = friends.`Friend`
UNION ALL SELECT DISTINCT *, '1' FROM messages where `Poster`='1'
) var
LEFT JOIN
(
select `ID` as `AuraID`, `Status` as `AuraStatus`, count(*) as `Aura`
from messages_aura
) aura ON (var.Poster = aura.AuraID AND var.ID = aura.AuraStatus)
) final
GROUP BY `ID`, `Poster`
ORDER BY `Time` DESC LIMIT 10
Here is my messages_aura table layout. It shows ID, Status and UserID.
Here is the output from the above statement.
(The ID from the above screenshot refers to Poster below and the Status from the above screenshot refers to ID below)
The statement should give the bottom row a Aura count of 1 and the top row an Aura count of 2. What's wrong?


You're missing GROUP BY, so it's counting everything instead of grouping by some columns.
LEFT JOIN
(
select `ID` as `AuraID`, `Status` as `AuraStatus`, count(*) as `Aura`
from messages_aura
GROUP BY AuraID, AuraStatus
) aura ON (var.Poster = aura.AuraID AND var.ID = aura.AuraStatus)

Related

MySQL - GROUP BY with ORDER DESC not working

Hi I am having a problem with following query.
SELECT id, user_id, cloth_id FROM `items` GROUP BY user_id ORDER BY id desc LIMIT 3
I want the latest records with group by but somehow its showing old records.
I have also gone through MySQL - Group by with Order by DESC but not working as expected.

Try this:
SELECT i.id, i.user_id, i.cloth_id FROM
(
SELECT max(id) as id, user_id FROM `items` GROUP BY user_id
) temp
LEFT JOIN `items` i on i.user_id = temp.user_id AND i.id = temp.id
in temp you get each user with the latest id.
in i you get the cloth_id for that combination

How to further filter GROUP BY record in mysql?

Please check the images i want complete ROW of query-id "43"(and with another nic_id max query_id row) but it give me only max query_id, I tried different queries for-example:
SELECT `Query_id`, `nic_id`, `date`, `subject`, `followup_no`, MAX(Query_id) as queryid FROM `sales_queries` GROUP BY `nic_id` HAVING MAX(`Query_id`)
SELECT `Query_id`, `nic_id`, `date`, `subject`, `followup_no`, MAX(Query_id) as queryid FROM `sales_queries` WHERE GROUP BY `nic_id` HAVING MAX(`Query_id`)
SELECT `Query_id`, `nic_id`, `date`, `subject`, `followup_no`, MAX(Query_id) as mxqueryid FROM `sales_queries`WHERE `Query_id` = (SELECT MAX(`Query_id`) FROM `sales_queries`) GROUP BY `nic_id`
when customer visit again followup increase(+1) with his same nic_id with different subject.
i want complete 43 row with subject "Registration4", date etc
NOT THIS, it should be Registration4 date:2015-09-11

Similarly to the answer to this question, you can use a subquery and join in order to fetch the results you are after. Something similar to the following should work:
SELECT `Query_id`, `nic_id`, `date`, `subject`, `followup_no`
FROM `sales_queries` AS sq
INNER JOIN (
SELECT MAX(`Query_id`) AS mId
FROM `sales_queries`
GROUP BY `nic_id`
) AS subsq ON subsq.mId = sq.Query_id

i am using below three queries in three different pages. I want IF MAX(Query_id) is not available specific range of dates then it ignore it.
///////////// QUERY 1 \\\\\\\\\\\\\\\\\\\\\
$sql="SELECT * FROM sales_queries AS sq
INNER JOIN ( SELECT MAX(Query_id) AS mId FROM sales_queries WHERE follow_up > '".$s_date."' GROUP BY nic_id ) AS subsq
ON subsq.mId = sq.Query_id";
///////////// QUERY 2 \\\\\\\\\\\
$sql="SELECT * FROM sales_queries AS sq
INNER JOIN ( SELECT MAX(Query_id) AS mId FROM sales_queries WHERE follow_up BETWEEN '".$s_date."' AND '".$e_date."' GROUP BY nic_id ) AS subsq
ON subsq.mId = sq.Query_id";
///////////// QUERY 3 \\\\\\\\\\\
$sql="SELECT * FROM sales_queries AS sq
INNER JOIN ( SELECT MAX(Query_id) AS mId FROM sales_queries WHERE follow_up BETWEEN '".$s_date."' AND '".$e_date."' GROUP BY nic_id ) AS subsq
ON subsq.mId = sq.Query_id";

Union multiple table with different column for order by date

I search a solution for do this req' SQL because this don't work, like_supplier table and like product table work correctly but when i add the table comments this don't work, i know haven't the same column in table comment but how i can do this correctly ? Thanks in advance.
SELECT DISTINCT *
FROM (
(SELECT DISTINCT lp.customer_id, lp.`date`, lp.`product_id`, lp.`classes`, Null as `comment`
FROM
`like_product` as lp,
`supplier_products` as sp
WHERE
sp.`product_id` = lp.`product_id`
AND sp.`supplier_id`=".$customer_id.")
UNION DISTINCT
(SELECT DISTINCT ls.`customer_id`,ls.`date`, Null as `product_id`, ls.`classes`, Null as `comment`
FROM
`like_supplier` as ls,
`supplier_products` as sp
WHERE
sp.`supplier_id`=".$customer_id."
AND sp.`product_id` = ls.`product_id`)
UNION DISTINCT
(SELECT com.`sender_id`, com.`date`, com.`product_id`, com.`classes`, com.`comment`
FROM `comments` as com)) as a
ORDER BY a.`date` desc

Try just to clarify all aliases and column names:
SELECT DISTINCT
a.id,
a.`date`,
a.product_id,
a.classes,
a.comment
FROM (
(SELECT DISTINCT
lp.customer_id as id,
lp.`date` as `date`,
lp.`product_id` as product_id,
lp.`classes` as classes,
Null as comment
FROM
`like_product` as lp
INNER JOIN
(SELECT *
FROM
`supplier_products`
WHERE
supplier_id=".$customer_id."
) as sp
ON
sp.`product_id` = lp.`product_id`
)
UNION DISTINCT
(SELECT DISTINCT
ls.`customer_id` as id,
ls.`date` as `date`,
Null as `product_id`,
ls.`classes`,
Null as `comment`
FROM
`like_supplier` as ls
INNER JOIN
(SELECT
*
FROM
`supplier_products`
WHERE
supplier_id=".$customer_id."
) as sp
ON sp.`product_id` = ls.`product_id`)
UNION DISTINCT
(SELECT
com.`sender_id` as id,
com.`date` as `date`,
com.`product_id` as product_id,
com.`classes` as classes,
com.`comment` as comment
FROM `comments` as com
)
) as a
ORDER BY a.`date` desc

Mysql GROUP BY and ORDER BY DESC [duplicate]

This question already has answers here:
Get top n records for each group of grouped results
(12 answers)
Closed 9 years ago.
This is my full query:
SELECT * FROM `clientgroupassign`
LEFT JOIN `clients` ON `clientgroupassign`.clientId = `clients`.clientId
LEFT JOIN `users` ON `carerId` = `userId`
LEFT JOIN
(SELECT * FROM
(SELECT * FROM `contacts` WHERE `contactGroup` = 4 ORDER BY `contactId` DESC)
as `contacts`
GROUP BY (`contactClientId`)
) AS `contacts` ON `contactClientId` = `clients`.clientId
WHERE groupId = 4
ORDER BY `clients`.clientId
There is a problem with third join causing the script to execute for about 1 minute. When I run it separattly in PMA:
SELECT * FROM (SELECT * FROM `contacts` WHERE `contactGroup` = 4 ORDER BY `contactId` DESC) AS `contacts` GROUP BY (`contactClientId`)
it still gets very long to execute.
What I want is to get one, last added row from contacts for each client who is in the group 4(client can be in various groups).
Thanks.

To get "last added row from contacts for each client who is in the group 4" try this:
SELECT
c.*
FROM(
SELECT
contactClientId,
MAX(contactId) as cid
FROM
contacts
WHERE
contactGroup = 4
GROUP BY
contactClientId
ORDER BY
NULL
) as tmp
INNER JOIN contacts as c
ON c.contactId = tmp.cid
AND c.contactClientId = tmp.contactClientId
If contactId is PK in contacts then the second join clause is not needed.
By default, MySQL sorts all GROUP BY col1, col2, ... queries as if you
specified ORDER BY col1, col2, ... in the query as well. If you
include an ORDER BY clause explicitly that contains the same column
list, MySQL optimizes it away without any speed penalty, although the
sorting still occurs. If a query includes GROUP BY but you want to
avoid the overhead of sorting the result, you can suppress sorting by
specifying ORDER BY NULL.
The complete docs.
Full query:
SELECT * FROM `clientgroupassign`
LEFT JOIN `clients` ON `clientgroupassign`.clientId = `clients`.clientId
LEFT JOIN `users` ON `carerId` = `userId`
LEFT JOIN
(
SELECT
c.*
FROM(
SELECT
contactClientId,
MAX(contactId) as cid
FROM
contacts
WHERE
contactGroup = 4
GROUP BY
contactClientId
ORDER BY
NULL
) as tmp
INNER JOIN contacts as c
ON c.contactId = tmp.cid
AND c.contactClientId = tmp.contactClientId
) AS `contacts` ON `contactClientId` = `clients`.clientId
WHERE groupId = 4
ORDER BY `clients`.clientId

Slow query with IN operator

I am having a problem with one query. I am sure that the problem is IN operator but I don't know how and with what should I replace it?
Query:
SELECT `a`.`title`, `a`.`askprice`, `a`.`picture`, `a`.`description`, `a`.`userid`,
`a`.`id`
FROM (`mm_ads` AS a)
LEFT JOIN `mm_ads_fields_values` AS afv ON `a`.`id` = `afv`.`aid`
WHERE `a`.`status` = 1
AND `a`.`category` = '230'
AND `a`.`id` IN (2194,2200,2205,2215,2233,2238,2240,0,2243,2255,2257,2260,2263,2264,2266,2269,2272,2274,2276,2277,2279,2282,2284,2286,2288,2293,2297,2300,2303,2306,2310,2311,2318,2322,2324,2326,2330,2335,2340,2347,2351,2357,2364,2370,2375,2387,2391,2399,2404,2408,2413,2571,2574,2576,2578,2580,2582,2584,2586,2588,2590,2592,2597,2599,2601,2605,2606,2612,2615,2618,2621,2626,2628,2632,2637,2639,2641,2643,2646,2647,2653,2662,2664,2667,2670,2673,2677,2680,2687,2689,2691,2693,2696,2698,2701,2703,2705,2708,2710,2711,3666,3674,3693,3697,3704,3711,3718,3727,3732,3736,3761,3764,3771,3776,3779,3786,3802,3807,3813,3818,3844,3847,3853,3866,3870,3873,3879,3883,4283,4287,4292,4300,4305,4313,4332,4339,4348,4354,4361,4367,4371,4378,4391,4412,4424,4441,4445,4451,4458,4466,4473,4479,4494,4508,4515,4523,4530,4537,4541,4542,4575,4584,4602,4621,4629,4638,4647,4652,4659,4665,4670,4677,4684,4690,4693,4702,4712,4720,4726,4732,4740,4747,4755,4763,4772,4776,4779,4784,4788,4790,4793,4797,4802,4807,4811,4818,4824,4831,4839,4844,4848,4851,4855,4867,4873,4877,4887,4894,4897,4901,4908,4912,4916,4926,4932,4939,4944,4949,4956,4959,4968,4977,4981,5001,5008,5012,5015,5021,5027,5034,5038,5045,5048,5053,5058,5063,5066,5070,5071,5077,5080,5085,5089,5096,5104,5108,5113,5114,5120,5127,5131,5135,5141,5150,5155,5159,5170,5174,5179,5187,5196,5205,5209,5215,5236,5254,5273,5281,5290,5309,5319,5323,5327,5350,5357,5363,5364,5372,5378,5409,5425,5434,5442,5461,5468,5477,5489,5497,5501,5515,5522,5529,5536,5541,5548,5558,5569,5585,5591,5597,5611,5619,5626,5635,5644,5653,5661,5667,5680,5688,5695,5702,5713,5725,5730,5734,5766,5781,5830,5882,5896,5928,5936,5943,5952,5958,5973,5998,6007,6018,6026,6083,6097,6103,6109,6114,6119,6124,6130,6136,6144,6152,6158,6172,6181,6192,6202,6211,6218,6223,6226,6230,6234,6239,6246,6256,6259,6266,6269,6273,6277,6282,6286,6291,6297,6301,6305,6309,6312,6315,6321,6326,6333,6338,6347,6352,6358,6365,6367,6372,6383,6389,6396,6401,6408,6413,6420,6424,6433,6471,6477,6487,6493,6498,6502,6506,6509,6511,6514,6519,6532,6539,6546,6551,6557,6562,6568,6577,6611,6618,6622,6625,6630,6635,6639,6648,6650,6653,6657,6661,6664,6671,6672,6679,6683,6687,6692,6695,6700,6704,6709,6712,6713,6716,6719,6724,6725,6733,6736,6754,6776,6781,6784,6791,6794,6807,6811,6816,6821,6826,6827,6867,6873,6879,6883,6893,6900,6908,6913,6919,6925,6931,6935,6944,6950,6955,6959,6964,6967,6970,6986,6990,6995,6998,7001,7003,7007,7012,7015,7019,7023,7025,7030,7033,7037,7041,7046,7052,7053,7057,7060,7063,7065,7068,7081,7085,7090,7091,7094,7096,7101,7107,7113,7116,7119,7122,7130,7138,7153,7154,7158,7161,7164,7167,7177,7179,7190,7198,7203,7207,7211,7215,7225,7229,7235,7240,7242,7248,7253,7256,7258,7259,7263,7269,7275,7277,7282,7285,7290,7294,7298,7302,7306,7310,7316,7318,7321,7326,7331,7336,7339,7345,7348,7355,7359,7364,7369,7374,7379,7383,7386,7391,7395,7399,7403,7410,7415,7418,7423,7427,7432,7434,7438,7457,7458,7460,7463,7465,7468,7471,7474,7476,7479,7481,7483,7485,7487,7490,7492,7494,7498,7501,7504,7507,7511,7514,7517,7520,7525,7530,7534,7540,7543,7546,7548,7551,7591,7596,7599,7606,7609,7615,7622,7629,7639,7643,7648,7650,7658,7662,7667,7670,7677,7681,7686,7691,7693,7700,7702,7707,7712,7716,7725,7740,7746,7752,7759,7760,7763,7766,7772,7776,7985,7993,8000,8007,8028,8035,8042,8050,8057,8067,8074,8084,8091,8097,8103,8109,8111,8129,8233,8237,8241,8245,8249,8252,8260,8264,8292,8300,8309,8397,8420,8426,8430,8434,8437,8444,8448,8454,8462,8470,8477,8483,8488,8492,8499,8509,8515,8520,8526,8531,8538,8543,8548,8552,8557,8561,8565,8569,8573,8576,8581,8586,8594,8599,8608,8612,8615,8620,8624,8629,8632,8638,8641,8646,8650,8654,8655,8660,8665,8668,8673,8675,8681,8686,8691,8695,8700,8704,8708,8713,8718,8722,8727,8742,8747,8780,8783,8786,8789,8793,8797,8802,8807,8810,8813,8816,8819,8821,8825,8828,8831,8834,8839,8844,8847,8852,8853,8855,8858,8861,8864,8868,8872,8874,8878,8880,8884,8888,8891,8897,8902,8907,8916,8917,8921,8925,8929,8934,8939,8946,8959,8960,8966,8972,8979,8982,8987,8992,8994,9008,9011,9014,9018,9023,9027,9031,9035,9040,9043,9046,9053,9057,9061,9066,9071,9075,9078,9081,9086,9090,9095,9102,9105,9112,9117,9121,9129,9132,9137,9140,9142,9145,9151,9156,9171,9176,9192,9196,9202,9207,9213,9219,9222,9225,9229,9235,9242,9250,9263,9269,9273,9278,9284,9295,9303,9304,9305,9311,9319,9322,9328,9332,9335,9339,9346,9350,9355,9361,9366,9370,9375,9379,9382,9385,9392,9397,9400,9404,9410,9413,9418,9421,9424,9437,9441,9446,9451,9457,9466,9477,9481,9492,9495,9511,9516,9519,9523,9526,9532,9543,9684,9690,9387,8911,8228,8116,7756,6887,6829,5966,5335,5315,5300,4400,3840,12881,12893,12898,1180,1499,2188,2251,2256,2295,9462,9529,9750,9922,10087,10107,11089,11392,9605,9607,9612,9615,9619,9627,9633,9638,9640,9642,9669,9677,9681,9694,9697,9703,9707,9709,9711,9714,9716,9720,9726,9730,9733,9737,9740,9745,9752,9757,9767,9776,9778,9779,9784,9787,9789,9792,9796,9799,9803,9806,9811,9818,9820,9826,9827,9832,9836,9845,9847,9850,9852,9855,9858,9861,9862,9864,9868,9871,9875,9882,9886,9889,9892,9897,9899,9903,9907,9913,9916,9920,9926,9928,9930,9932,9936,9940,9943,9946,9950,9954,9957,9962,9964,9966,9973,9976,9977,9980,9981,9985,9986,9987,9989,10019,10022,10025,10027,10028,10055,10062,10189,10195,10197,10212,10220,10221,10224,10226,10229,10231,10232,10235,10428,10431,10434,10438,10440,10442,10443,10445,10448,10449,10455,10459,10466,10469,10471,10473,10474,10475,10476,10478,10481,10484,10486,10489,10493,10494,10496,10497,10499,10501,10502,10503,10508,10511,10514,10516,10518,10521,10524,10528,10529,10532,10160,10158,10156,10153,10149,10146,10138,10133,10132,10129,10126,10123,10119,10117,10116,10112,10111,10109,10101,10099,10097,10093,10090,10086,10084,10082,10078,10074,10070,10066,10045,10052,10041,10037,10036,10033,18596)
AND `a`.`userid` = '136'
GROUP BY `a`.`id`
ORDER BY `id` DESC, `id` DESC
LIMIT 15;
How can I improve the speed of that query?
Let me explain my tables:
mm_ads: Table where ads are stored in
mm_ads_fields_values: Table where options for ads are stored in.
Example:
Car is ad and having one row in table mm_ads. Car has following options: brand, model, color,... So Car ad has more than one row in table mm_ads_fields_values.
So if I search only cars with "black" color, the query will get first all IDs that have color option set to "black". Then I put these IDs to query.
Update:
Columns in table mm_ads_fields_values: id, aid, db_name, value
Sorry for my bad English..

Remove the LEFT JOIN and GROUP BY parts:
SELECT `a`.`title`, `a`.`askprice`, `a`.`picture`, `a`.`description`, `a`.`userid`, `a`.`id`
FROM `mm_ads` AS a
WHERE `a`.`status` = 1
AND `a`.`category` = '230'
AND `a`.`id` IN (…)
AND `a`.`userid` = '136'
ORDER BY
`id` DESC
LIMIT 15
Make sure that id is defined as a PRIMARY KEY.
I'm assuming the query is built by an ORM so recheck your model definition, the LEFT JOIN and GROUP BY are redundant here.
Update:
If you are searching for black cars, you can do it in a single query like this:
SELECT a.*
FROM mm_ads_fields_values afv
JOIN mm_ads a
ON a.id = afv.aid
WHERE afv.field = 'color'
AND afv.value = 'black'
ORDER BY
afv.aid DESC
LIMIT 15
Create a composite index on mm_ads_fields_values (field, value, aid).
Update 2:
To find black BMW:
SELECT a.*
FROM (
SELECT aid
FROM mm_ads_field_values afv
WHERE (field, value) = ('color', 'black')
OR (field, value) = ('model', 'BMW')
GROUP BY
aid
HAVING COUNT(*) = 2
ORDER BY
aid DESC
LIMIT 15
) af
JOIN mm_ads a
ON a.id = af.aid
ORDER BY
aid DESC

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