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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Joins in Update statement in sqlite

CREATE TABLE Table_1 ( Id INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL , EmailId VARCHAR ) INSERT INTO Table_1 VALUES (1,'raj@gmail.com'); INSERT INTO Table_1 VALUES (3,'test@gmail.com'); ...
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71 views

Update table from different table

UPDATE RBI.RBI_OV_F_DETAIL A SET (BRANCH_ID, BRANCH_NUMBER) = ( SELECT PRICE_BRANCH_ID, PRICE_BRANCH FROM RSE.RSE_SO_F_ORDERS B WHERE A.SOURCE_ID = ...
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97 views

MySQL add few column exception for TRIGGER UPDATE FOR EACH ROW

How to effectively add column id, name exception for trigger: CREATE TRIGGER updated BEFORE UPDATE ON table1 FOR EACH ROW SET NEW.date=NOW() so that date=NOW() will be affected on updating any ...
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61 views

Update different columns on different clauses

I have a database table in Postgres 9.3 with the following layout: id SERIAL, col1 INT, col2 INT Whenever a new row is inserted, I will have to update ALL rows col1 and/or col2 in different cases ...
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36 views

Optimizing bulk update performance in Postgresql with dependencies

Basically my question is the same as this one, but WITH dependencies, so drop/renaming the table is not a trivial option (I assume). We are refactoring a large, poorly designed table which has many ...
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36 views

Why does the behavior of array syntax differ from '(?,?)' syntax when updating a point field and that field is NULL?

I'm using PostgreSQL 9.3.5. Suppose I have the following table: CREATE TEMPORARY TABLE point_test ("name" varchar(255), "pt" point); I then insert a row, leaving pt NULL: INSERT INTO point_test ...
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40 views

Bulk update performance

I have a several process that aggregate some statistics on items (how much was shown, clicked ... around 30 factors). Once in a 5 minutes i flush the aggregate data to postgres (9.1). I have 250K ...
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69 views

Update on a small table times out

We use Microsoft SQL Server Express Edition with Advanced Services 2008 R2 SP2 We have two locations. Each location has one sql server that serves about 20 client computers. Client computers are ...
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2answers
126 views

Update on view over partitioned tables updating all indexes

We have a table, which is partitioned through a date field into separate years. There is a view over all of these tables (Call) Schema is as follows: CREATE TABLE [dbo].[Call_2015]( [calID] ...
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153 views

Updating +150,000 rows using .sql file causes ERROR 2013 Lost connection to MySQL server during query

I am using ubuntu 12.04. I have a .sql file that is around 5 megabytes. When I use the command: mysql -u -p -v database query.sql The server prints out the content of the file (because of --verbose) ...
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204 views

Adding a sequence number to existing rows

I have a table with an OrderSequence column. The schema looks roughly like this: id Name OrderSequence I have an array of ids ["1", "2", "3", "4"] from an application, and I want to set the ...
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54 views

Trigger on a Schema

Is it possible to create a Trigger on a Schema? I have to audit the changes on my tables. But I have a lot of tables and I don't one to create a trigger on them one by one. --Database level trigger. ...
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16 views

How to minimize the writes needed to update a counter field multiple times

I need to minimize the number of queries that are executed just for updating a counter field. One of my example counter fields is raised by 1 everytime a page is visited, I was wondering what could ...
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1answer
108 views

Improve performance on concurrent UPDATEs for a timestamp column in Postgres

I am using a timestamp column called updated_at for cache invalidation. More information on this particular technique here. The queries all have the same format UPDATE "managers" SET "updated_at" = ...
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76 views

MySQL Update Multiple Rows in Large Table

I have a large InnoDB MySQL database table. I would like to run this query against the database table: Update myBigTable Set someColumn=x WHERE userId = 7 OR userId = 88 OR userId = 22 OR userId = ...
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30 views

How can I maintain old information after an update?

I am having an issue figuring out a solution to not lose old information. For example, customers can place many orders. Let's a customer, Mary, makes her 1st order in 2013. Fast-forward to 2014, ...
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2answers
594 views

MySQL ON DUPLICATE KEY UPDATE performance issue

We have a table with over 200k rows. Every row belongs to a category, there are almost 50k rows per category. What is the best way to update all rows of that category? We are using a script like ...
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50 views

How to update a single record in a table based of foriegn key ID in another table?

I am still very new to sql. I am having troubles updating one table. I am sending information from a web application into Microsoft SQL 2008 database. I have a table called EmployeePermissions that ...
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1answer
240 views

Create a new table (multiple columns) by selecting random values from an existing table

I am stuck on the following task (PostgreSQL 9.3). Let's say we have the following table1 (which has 10k rows): table1: id 754 800 330 4 59 My goal is to create another table2 with two columns ...
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1answer
954 views

Postgres Update, limit 1

I have a postgres database which contains details on clusters of servers, such as server status (active, standby, etc). Active servers at any time may need to fail over to a standby, and I don't care ...
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31 views

How do I stop views (large data sets) from freezing my database

I am working with tables that contain upwards of 200,000 rows. My boss wants to use views that refer to other views in order to have things be more automated. The problem is that the MySQL server ...
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212 views

How to update ID=null values in table to incremental counter values?

On SQL Server 2012, i've got an intermediate/staging table for merging existing with new data, where I want to insert numeric IDs for newly created rows: ID NaturalID Comment 1 ...
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5k views

MYSQL - UPDATING multiple rows with different values in one query (for dummies)

I am trying to understand how to UPDATE multiple rows with different values and I just don't get it. The solution is everywhere but to me it looks difficult to understand. For instance, two updates ...
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76 views

Update previous value field

I inherited a database that has multiple tables that contain some form of an object ID, a date, and a value. The metrics depend on comparing the current value on any given date to the previous value ...
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29 views

Mongo DB - reading during update

Is it possible in a three-member-replica set (1 primary, 2 secondaries) to update records on the primary, or even delete several records and insert the updated data, and still execute read-ops on the ...
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128 views

ON DUPLICATE KEY UPDATE faster than UPDATE

I have a table with about 17 million rows: mysql> describe humans_we_respect; ...
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244 views

Optimizing concurrent updates in Postgres

I'm running concurrent Postgres queries like this: UPDATE foo SET bar = bar + 1 WHERE baz = 1234 Each query affects the fixed K number of rows, and I can't find a way to enforce the order in which ...
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Compare While doing update [closed]

I have a to modify a Import job that checks values in an table that is only used for read operation and updates them if the Source has changed: Update mytable as Target Set c1 = Source.c1, c2 = ...
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81 views

how should i do this trigger?

I am a newbie to the sql world :) Right now i'm trying to create my first mysql trigger that would either update a row or insert a new one. Could you help me with that ? Here is the code : DELIMITER ...
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1answer
107 views

How to support multiple updates in this trigger?

Below is the code of a trigger, basically it calls a function in case the record that is being updated does not have other row associated by it's Id in another table. In a multiple row update this ...
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221 views

phpmyadmin not working after mysql update

i followed this guide to update my mysql form 5.1 to 5.5. After lots and lots of command and headache, i was able to upgrade mysql. i checked the version via terminal. But now there is another ...
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64 views

Oracle after insert trigger vs update performance in plsql block

I want to know whether an after insert trigger is better than an insertion statement followed by update statement in plsql block.
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105 views

UPDATE Query replacing string primary key taking days to resolve

I'm working with a DB (not designed by me) that had the primary key set to a 47 character length string, which is causing problems due to the fact that the table has over 20 million rows, and this ...
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127 views

Mysql sequential numbering based on MAX of another column

I've a table lp_pictures which have these fields: [id | plate_uid] [1 | aaa] [1 | aaa] [1 | aaa] [1 | bbb] [1 | bbb] [1 | bbb] and i need to UPDATE the field id to becomes: [id | plate_uid] ...
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270 views

Dynamic UPDATE fails due to unwanted parenthesis around string in plpgsql

Using PostgreSQL 9.3.4 on Mac OSX 10.9.2 with Postgres.app. I want to apply a function to all columns in a table, specifically I want to trim white space. So far I've got this in a file test.sql: ...
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113 views

Very slow update with subquery (different tables)

I run this query to update "domains" table based on "log" table: UPDATE domains SET domains.mx_collected = 0 WHERE domains.domain IN (SELECT log.mail as domain_name FROM log WHERE `time` >= ...
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1answer
2k views

How to remove known elements from a JSON[] array in PostgreSQL?

I'm facing an issue regarding using the JSON data type in PostgreSQL. I try to achieve storing a Java model denormalized in the DB. The model features lists of complex objects. Thus, I decided to ...
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38 views

How does partitioning and the lack of a primary key affect ON DUPLICATE KEY UPDATE

Consider a table with the following columns: phone BIGINT NOT NULL PRIMARY KEY, name VARCHAR(64), state VARCHAR(64) We would like to partition the table on state, however that would require ...
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62 views

How to update a column in a table with data from another, unrelated tables columns data jus in order it selected?

There are two tables that unrelated. I want to update a field in first table with data that selected from second table in some order. There is no relations between tables, fields and data. I have just ...
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1answer
3k views

Update all columns from another table

I need to update a table from another one, and I need to update all columns. Besides listing every column in the SET clause, is there a way to update them all at once? Like this: update tableA set * ...
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1answer
75 views

Postgresql condition on subquery results

This is a new question based on the solution to my previous question I have the following tables: users int (pk) user_id date last_visit int (fk) local_site sites int (pk) site_id site_stats ...
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43 views

Access 2013 compare changes made to table

I am currently working on an Access 2013 database and trying to find the best solution to a problem I am having creating it (I am fairly new to databases so bear with me). Situation: Data is imported ...
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1answer
230 views

update variable from multiple tables in one row

I have two databases, and I need to UPDATE variable 'birthday' from one row to another checking 'name' (from db1 to db2). The problem is, that 'name' variable in second db is located in another table ...
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238 views

UPDATE CONCAT without duplicates

I would like to concatenate multiple values ​​and remove duplicates (case-insensitive) in the same field with SQL only. Without using a unique key or stored procedure. Ex. ...
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2answers
72 views

For SQL Server, What is the proper way to update a table?

I don't have a mentor to ask so I am seeking direction from the DBA community. I am in charge of a SQL SERVER 2008 R2 and SQL Azure databases that are the resources for a website and an ERP system for ...
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1answer
220 views

How to reuse an update trigger for multiple tables in postgresql?

In the database for a new project, I've started the convention of having each table have a last modified timestamp column. To implement this, I wrote a trigger for each table: CREATE TRIGGER ...
2
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1answer
51 views

Update only the oldest entry in a table with foreign key criteria

I'm working on a forum website. What I am trying to do is updating the thread Title and Content (first post), which resides in different tables - "Threads" and "Posts". "Threads" "Posts" I'm ...
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78 views

Oracle tables partition related

Here is my doubt. Is it possible to apply a partition to one table depending in the partitions values of another one? Why I am asking? I have one table where information headers are persisted, and ...
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2answers
220 views

UPDATE table with another table data

I want to update the table car_check field fencing.(total 40 rows).I also use postgis function. I think it's a little difficult.Any suggestions? The code is the first carid example. UPDATE car_check ...
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416 views

Free space from image column after update

I'm doing some cleanup on one of our database for development purposes on a test server. There are a couple of tables with one IMAGE column. Both tables take roughly 50Gb of space, being the image ...