When I run this update query in my server. Desired records are updating according to requirement. But all the other records reside in table1 set as NULL expect newly updated one. Any one there who can help on this. Thankyou in advance.
UPDATE MYDB1.`table1` t1
JOIN MYDB1.`table2` t2
ON t2.id = t1.table2_fill_id
JOIN MYDB2.tbl3 t3
ON t2.abc_id = t3.abc_id AND
t2.date = t3.opn_date AND
t2.flag IS TRUE
SET t1.value = t3.column15_value
WHERE code = "ABCD";
first set output for last tables like
update table4 d join
(select a.id, b.name from table1 a, table2 b where a.id = b.id) table3
on d.id = table3.id and d.code = 'abcd'
set d.name = table3.name
this is just an example
use your tables
Related
I have 3 tables, T1, T2, T3. I need to update the stock_status from T1 and limited from T2 with the values from stock_status and limited from T3, only where the sku are matching.
Also the entity_id is the correspondent for product_id.
Here is an image to understand better
I’m stuck at moving the values from stock_status from T3 in stock_status from T1, since I don’t have a common field directly.
For limited field, I tried.
UPDATE t2,t3 INNER JOIN t3 on t2.sku = t3.sku SET t2.limited = t3.limited
Try these
UPDATE t1
JOIN
t2
JOIN
t3
SET
t1.stock_status = t3.stock_status
WHERE
t1.product_id = t2.entity_id
AND t2.sku = t3.sku;
.
UPDATE t2
JOIN
t3
SET
t2.limited = t3.limited
WHERE
t2.sku = t3.sku;
You should use add an inner join between t2 and t1 for update also t1.stock_status
UPDATE t2,t1
INNER JOIN t3 on t2.sku = t3.sku
INNER JOIN t1 on t1.product_id = t2.entity_id
SET t2.limited = t3.limited,
t1.stock_status = t3.stock_status
I'm trying to update a table in MySQL with data from another table.
UPDATE KassaticketRegels
SET soort = (SELECT t3.benaming
FROM KassaticketRegels AS t1 INNER JOIN Diensten AS t2 ON t1.dienst = t2.id INNER JOIN DienstGroepen AS t3 ON t2.dienstGroep = t3.id
WHERE t1.id = KassaticketRegels.id)
When i simulate the query, it gives me 304 matched rows.
But when i press go, i get the error "#1093 - Table 'KassaticketRegels' is specified twice, both as a target for 'UPDATE' and as a separate source for data".
How can i solve this?
Looking to your code seems you need an update on inner join
UPDATE KassaticketRegels t1
INNER JOIN Diensten AS t2 ON t1.dienst = t2.id
INNER JOIN DienstGroepen AS t3 ON t2.dienstGroep = t3.id
set t1.soort = t3.benaming
I thought I will get answer for this query straight away but I didn't find any Q&A which was exactly what I am looking for.
So, I have two tables.
Table 1: id,c_id,created_at
Table 2:id,c_id,b_date,s_type
I want a query which gives output corresponds to each row in table 1. The output should be the latest b_date in table 2 prior to created_at in Table 1 and the s_type corresponding to the latest b_date. The linking condition between Table 1 and Table 2 isc_id. Both the tables have multiple rows containing same c_id.
My table 1,table 2 and output will look like this.
I am not allowed to embed images as of now. So please click to see the images.
Possibly this
SELECT T1.ID,T1.C_ID,T1.CREATED_AT,T2.B_DATE,T2.S_TYPE
FROM TABLE1 T1
JOIN TABLE2 T2 ON T1.C_ID = T2.C_ID
WHERE T2.B_DATE = (SELECT MAX(T3.B_DATE) FROM TABLE2 T3 WHERE T3.b_DATE < T1.CREATED_AT AND T3.C_ID = T1.C_ID)
;
or maybe this
SELECT S.ID,S.C_ID,S.CREATED_AT,S.B_DATE,T.S_TYPE
FROM
(
SELECT T1.ID,T1.C_ID,T1.CREATED_AT,T2.B_DATE,T2.S_TYPE
FROM TABLE1 T1
JOIN TABLE2 T2 ON T1.C_ID = T2.C_ID
WHERE T2.B_DATE = (SELECT MAX(T3.B_DATE) FROM TABLE2 T3 WHERE T3.b_DATE < T1.CREATED_AT AND T3.C_ID = T1.C_ID)
) S
JOIN
(SELECT T1.ID,T1.C_ID,T1.CREATED_AT,T2.B_DATE,T2.S_TYPE
FROM TABLE1 T1
JOIN TABLE2 T2 ON T1.C_ID = T2.C_ID
WHERE T2.B_DATE = (SELECT MAX(T3.B_DATE) FROM TABLE2 T3 WHERE T3.C_ID = T1.C_ID)
) T ON S.C_ID = T.C_ID
;
Case:
How to update table1 with data from table2 where id is equal?
Problem:
When I run the following update statement, it updates all the records in table1 (even where the id field in table1 does not exist in table2).
How can I use the the multiple update table syntax, to update ONLY the records in table1 ONLY where the id is present in table2 and equal?
UPDATE table1,table2
SET table1.value=table2.value
WHERE table2.id=table1.id
Thanks in advance.
here's the correct syntax of UPDATE with join in MySQL
UPDATE table1 a
INNER JOIN table2 b
ON a.ID = b.ID
SET a.value = b.value
SQLFiddle Demo
EDIT
For MySql it'll be
UPDATE table1 t1 INNER JOIN
table2 t2 ON t2.id = t1.id
SET t1.value = t2.value
sqlfiddle
Original answer was for SQL Server
UPDATE table1
SET table1.value = table2.value
FROM table1 INNER JOIN
table2 ON table2.id=table1.id
sqlfiddle
You can try this:
UPDATE TABLE1
SET column_name = TABLE2.column_name
FROM TABLE1, TABLE2
WHERE TABLE1.id = TABLE2.id
UPDATE table1
SET table1.value = (select table2.value
WHERE table2.id=table1.id)
SELECT
count(t1.id) AS c1
FROM
table2
LEFT JOIN table1 AS t1 ON (t1.uid = table2.uid)
WHERE
table2.mode = 'ls'
GROUP BY
t1.id
c1 = 6 -> CORRECT!
SELECT
count(t2.id) AS c2
FROM
table2
LEFT JOIN table1 AS t2 ON (t2.pid = table2.id)
WHERE
table2.mode = 'ls'
GROUP BY
t1.id
c2 = 1 -> CORRECT!
SELECT
count(t1.id) AS c1,
count(t2.id) AS c2
FROM
table2
LEFT JOIN table1 AS t1 ON (t1.uid = table2.uid)
LEFT JOIN table1 AS t2 ON (t2.pid = table2.id)
WHERE
table2.mode = 'ls'
GROUP BY
t1.id
c1 = 6 -> CORRECT!
c2 = 6 -> WRONG!
How do I request both counts in one query, without getting wrong results?
I need to count two different requests at the same table (table1).
so, I'm using an alias for both request. (t1). Each alias-request is working fine alone. If I use both in the same query, i got wrong results.
count() will get you the number of records that are returned by your query. Since if you removed the counts and replaced it with * you would have 6 rows both of those counts are giving you 6.
Is there any reason why you cant use two sub selects and return the result of each of those?
So:
SELECT subQ1.c1, subQ2.c2 FROM
(SELECT count(t1.id) AS c1 FROM table2
LEFT JOIN table1 AS t1 ON (t1.uid = table2.uid)
WHERE table2.mode = 'ls') as subQ1,
(SELECT count(t2.id) AS c2 FROM table2
LEFT JOIN table1 AS t2 ON (t2.pid = table2.id)
WHERE table2.mode = 'ls') as SubQ2;
I believe your problem on the full query is your group by function. You are grouping by t.id, thus a1.id will have a different count based on how many rows you have.
What I mean by this is if there are 6 rows in table t, then count is going to return 6 for table t; but also since there looks to be a 1 to 1 relation on table a, there are 6 matching rows in table a to the 6 matching rows in table t. such that
t.id = a.id
1 = 1
2= 2 ...etc.
Thus your count is returning rows versus the count you believe you should have? I believe sum function is what you want to use here.
You could try this...but I'm not really sure what you're trying to do.
SELECT (...)
count(CASE WHEN t1.uid = t3.uid THEN t1.id ELSE NULL END) AS CBanz,
count(CASE WHEN ta1.pid = t3.id THEN a1.id ELSE NULL END) AS CBanz1
FROM
t0
LEFT JOIN (...)
LEFT JOIN t1 ON (t1.uid = t3.uid)
LEFT JOIN t1 AS a1 ON (a1.pid = t3.id)
WHERE (...)