UPDATE changes the values of the specified columns in all rows that satisfy the condition. Only the columns to be modified need be mentioned in the SET clause; columns not explicitly modified retain their previous values.

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7
votes
2answers
293 views

8k row overflow error when updating row of size 5k

I'm trying to update a target table which has one row of size 5k to a row of size 5k also. Since it's one row it's easy to know the row actual size: select * from ...
2
votes
1answer
204 views

How to merge 2 tables in Oracle

I have 1 big table with 25 milions of rows and i have to merge data of another table with 500,000 rows into the big table. the rows of both tables have the same columns and i have to check if the key ...
3
votes
1answer
62 views

UPDATE on column referenced in sub-query

We have a query that updates a column for all rows matching a condition which involves a subselect on said column, like the following: update CE_WORKSET_READ_ENTRY workset set workSet.MARK = 0, ...
3
votes
3answers
142 views

How can I optimise an Update on a large table?

I am using Oracle 11g, I have to update 7 fields on a table with 14 millions of rows, the updated columns get the new value from functions, the update looks like: update hslak set HSLAKSTS = ...
1
vote
2answers
129 views

UPDATE only if COUNT from another table is not zero

I update a table by counting the FK from another table as UPDATE table1 SET number = number + ( SELECT COUNT(*) FROM table2 WHERE table1.id=table2.id ) table1 is a big table, and I want to make ...
2
votes
1answer
66 views

Updating a table which contains an Image datatype column

I have a table which contains a few columns, one of which is an image datatype, this is used to store BLOB data, which could be anything from a jpg to a large PDF. I have a requirement to update one ...
0
votes
1answer
68 views

Update if not exists statement

If I have a simple table with 2 columns and a composite primary key consisting of both columns, how do I rename one of the columns but only if it doesn't cause a primary conflict? Here's a simplified ...
10
votes
5answers
672 views

Why does this UPDATE fail with a unique key constraint violation?

I'm an "accidental" DBA, relatively inexperienced and baffled by this problem. Running MS SQL Server 2012. The problem is with this UPDATE statement: UPDATE dbo.tAccts SET Ticket ...
1
vote
1answer
37 views

Update by iterating table in batches faster than whole table in PostgreSQL

I have a table with approximately one million rows. It is being used in production and I ran an UPDATE which covers ~95% of those rows. After five hours I cancelled the request because it was taking ...
0
votes
1answer
40 views

Update row contents on some condition

For example, let's say I'm building a database for an auction system, in which various users can partake in both selling and bidding on different items, I'd want for an "Auction" instance to also ...
1
vote
1answer
64 views

Updating multiple mysql rows where column has specific value

I have 1 CSV file with 50,000 rows of data and 2 columns. The columns are user ID's and twitter profile photos. 24525,https://pbs.twimg.com/profile_images/666407537084796928/YBGgi9BO.png ...
0
votes
0answers
59 views

Why MySQL is still “using temporary” when update by primary key?

I have a partitioned mysql table, table size is about 100M rows: CREATE TABLE `nearby` ( `id` int(10) unsigned NOT NULL, `nearby_1` varchar(750) NOT NULL DEFAULT '', `nearby_2` varchar(750) NOT NULL ...
0
votes
1answer
99 views

Update all rows from a table with random foreign key from another table

I have four tables: (show on image below) Topic whit columns: ID primary key int CategoryID references to table Category int UserID references to table User nvarchar(128) User with ...
0
votes
1answer
22 views

MySQL Replication Query

Imagine I have three servers. x.x.x.31 - master x.x.x.32 - slave x.x.x.33 - slave If I run a simple update in master. What does the slave servers done. run the update command or copy the updated data ...
2
votes
2answers
390 views

Update column with value of another column or another column

With PostgreSQL (I'm using the version 9.1) is it possible to do mass update with a single query a column value with the value of another column, but if the other column value is null, to use the ...
0
votes
0answers
107 views

How to create dynamic SQL using formulas stored on field - MYSQL

I have this table which contains a formula on the field calculation: CREATE TABLE IF NOT EXISTS `promo_type` ( `id` int(11) NOT NULL AUTO_INCREMENT, `name` varchar(150) NOT NULL, `calculation` ...
0
votes
2answers
39 views

What would cause an UPDATE statment to hang when executing from an .mdb file to SQL Server 2008 R2 over ODBC?

Is there anything that would cause an UPDATE statement INNER JOINed between a separate MS-Access linked table and an SQL Server 2008 R2 table to hang, when the values are being set on the SQL Server ...
-1
votes
2answers
236 views

Is there a way that I can merge the following update queries into one?

Is it possible to merge the following update queries into a single query? UPDATE tag.ItemTagValue SET [Value] = @firstNode WHERE FkTagID = 6 and TagIndex = 1 ...
2
votes
3answers
140 views

UPDATE query periodically is slower by factor of 5000x

I run a site (Magento) which have a problem with a specific UPDATE query. Under heavy load, this query runs ~200 times/minute, and takes in average 1 ms (stdev 0.2 ms). However, at intervals of 1-2 ...
7
votes
5answers
570 views

How to update 10 million+ rows in MySQL single table as Fast as possible?

Using MySQL 5.6 with InnoDB storage engine for most of the tables. InnoDB buffer pool size is 15 GB and Innodb DB + indexes are around 10 GB. Server has 32GB RAM and is running Cent OS 7 x64. I have ...
3
votes
1answer
243 views

How to insert/update millions of rows inside a sql server table(s) in an effective way?

Often in my job I have to create a procedure inside SQL Server that will process millions of data rows, save them into a temp table (staging table) and finally save them into a table (s) in a ...
0
votes
1answer
39 views

Update an Oracle DB with a max number for the null rows

I have an Oracle db and I need to update some columns and one of them is an number that has to be some kind of an id - max number on that column. If I use something like this: update ss_chest ssc ...
1
vote
1answer
160 views

INSERT don't work with NOT NULL but UPDATE does, why?

I have this table definition: CREATE TABLE `media` ( `id` int(11) NOT NULL AUTO_INCREMENT, `brands_id` int(11) DEFAULT NULL, `media_type` varchar(45) COLLATE utf8_unicode_ci DEFAULT NULL, ...
0
votes
1answer
166 views

Loop over all records in a table and edit a column in SQL Server

How can you loop over all the rows in a SQL Server table and edit a column? You know that: There are a lot of IDs skipped. The column creatie must be edit whit every time one minute. So the first ...
2
votes
2answers
261 views

MERGE command in SQL Server 2005

I have been trying to develop a MERGE in SQL Server 2005. It does not have all features yet, because I have been struggling in "how to put the merge logic WORKING AS A SET, rather than rows". ...
0
votes
3answers
90 views

Updating rows from other rows in a huge table

I have a huge table with items item-id | name | type | extra Many of them are "old versions" of type 0. I have to update the extra field in all new items (same item-id, but type > 0) with the ...
3
votes
4answers
604 views

Does updating a row with the same value actually update the row?

I have a performance-related question. Let's say I have a user with first name Michael. Take the following query: UPDATE users SET first_name = 'Michael' WHERE users.id = 123 Will the query ...
0
votes
0answers
18 views

1175 during UPDATE in MySQL Workbench

I have this error in Mysql Workbench when I update table without using key in where clause but update query fire from my Application using connectivity of database surprisingly I have no error . ...
0
votes
1answer
29 views

Update part of timestamp field

I'm trying to fix a glitch in one of my tables. Several hundred records were given the wrong timestamp. The times are correct, but the date is wrong. I could write a little java program to fix it, ...
0
votes
1answer
58 views

SQL Server - Update using Join in Merge

Scenario : I need to update values in a table by joining it with another temp table. But I am using a Merge statement to check various scenarios and update the values in the table when the condition ...
1
vote
1answer
58 views

What is the most compact way to calculate and then Update a maximum value for each day's data?

I have a database that stores records for each bundle of material. A sample is taken from each bundle and sent out for assaying (for lead and sulfur). I receive the assay data and write the assay ...
5
votes
4answers
512 views

How can I avoid repeating the same condition in a “when matched then update” clause?

I want to merge one table into another. I need to apply conditional logic in my WHEN MATCHED clause, which would ideally be done like this: MERGE INTO ATable AS a USING BTable AS b ON a.ID = b.ID ...
0
votes
1answer
18 views

PostgreSQL SQL: updating summaries

I'm trying to optimize a query like: UPDATE master SET count = (SELECT COUNT(*) FROM detail WHERE detail.master_id=master.id) Where the master table is large, so running this results in a huge ...
1
vote
1answer
71 views

UPDATE id table on the columns with the same name

I may be a newbie question but I don't know how to resolve this. I have a table like: name | id | value A 1286487 1286333 B 1286489 1286403 C 1286495 1286455 C ...
1
vote
1answer
844 views

MySQL UPDATE query stuck on “Sending Data” State

I am having difficulty getting an UPDATE query to successfully execute, due to the process getting stuck on "Sending Data" state. I feel this differs from similar questions about the "Sending Data" ...
1
vote
1answer
31 views

How do I uniquely update values of a text column before applying UNIQUE constraint?

I need to apply a unique constraint to a TEXT field which may or may not already contain duplicate values. If for instance I have ABC twice, I don't mind renaming them as ABC-1, ABC-2, but what if I ...
15
votes
3answers
393 views

Slow update on large table with subquery

With SourceTable having >15MM records and Bad_Phrase having >3K records, the following query takes almost 10 hours to run on SQL Server 2005 SP4. UPDATE [SourceTable] SET Bad_Count= ...
1
vote
1answer
59 views

SQL server UPDATE statement is processing records that should be eliminated by WHERE clause

I am getting a very odd error. Consider the table below. CREATE TABLE #MyTable ( Key1 INT , Key2 INT , x SMALLINT , y INT , z INT , a FLOAT , b FLOAT , c SMALLINT , s FLOAT ) -- insert ...
2
votes
1answer
36 views

Better way to update table with value from another table

I'm trying to rewrite the following query to make it more efficient: update c set c.cartype = (select Id from carTypes where carType = 'Coupe') from cars c inner join doorcount dc on c.Id = ...
2
votes
1answer
62 views

Best DB approach for a lot of updates

Recently I built an app that gets that from SVN repositories to run a few metrics. What I do is basically: 1) Read data from an existing SVN repository and save this data to a database (with only ...
1
vote
1answer
1k views

How to add/update a column with an incremented value and reset said value based on another column in SQL

I am stumped, I have searched and researched until my browser tabs no longer show the close button ("X") until you hover over them. I tried rewriting the search term over and over but I guess I do not ...
1
vote
3answers
180 views

Make another column in a table equal to the primary key column

In my notes table (MySQL database) I have id as the primary key. I want the column originalid to be the value of the primary key. Here is the query I run after creating a record which I thought would ...
0
votes
1answer
41 views

Array of strings when updating a field

Unintentionally discovered that following query works in PostgreSQL: UPDATE "sometable" SET "somefield" = ('string1', 'string2') WHERE "id" = 1; I'm passing an array of strings to field and the ...
12
votes
4answers
2k views

UPDATE performance where no data changes

If I have an UPDATE statement that does not actually change any data (because the data is already in the updated state). Is there any performance benefit in putting a check in the WHERE clause to ...
1
vote
0answers
690 views

MySQL - Truncated incorrect datetime value on update statement

I have an application which produces log files. These log files include a Timestamp field in the format 2015-08-25T09:35:01 UTC. (there will be apx 60 logs produced at 0.25 GB per day). I need to ...
0
votes
1answer
199 views

MySQL Trigger On UPDATE “Unknown Column” Error

I want to log a table when its updating a row which is column "insertDate" or "updateDate" value is before than 3 month. I wrote this trigger: DELIMITER /// CREATE TRIGGER ...
2
votes
1answer
83 views

Single row update using primary key affects many rows

I'm doing a very simple datetime update in a table using its primary key: update TABLE set END_DATE = '2015-10-14 00:00:00' where ID = 1165027; I received the message (1 row(s) affected) 183 ...
0
votes
1answer
26 views

How to make a mysql statement for sent log

I have a table called "make_sent_log" CREATE TABLE IF NOT EXISTS `make_sent_log` ( `id` int(11) NOT NULL AUTO_INCREMENT, `transaction_id` varchar(255) NOT NULL, `total_base` int(11) NOT ...
2
votes
1answer
47 views

Overwrite event - data from SQL Server to MySQL

In MySQL is it possible to execute an update query with values selected from external SQL Server database? I'd like to execute every night a timed query, which overwrites some data in MySQL with data ...
1
vote
1answer
67 views

How can I Rewrite Update Query to Update Using First Record From Inner Join?

I wrote up a question about trying to do an update with an inner join last week that got a lot of answers that I am currently trying out. Here is the link to the answer I used to get to the point I'm ...