Questions tagged [copy]
COPY is a PostgreSQL SQL statement for bulk loading tables and fetching table data or query results
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Move timescaledb hypertable from a postgresql server to another one
I want to move a timescaledb hypertable that's on the terabytes order. I wanted to do something like the following:
pg_dump -t "schema1"."table1" -h host1_ip -U username1 dbname1 | ...
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Determine new/changed data(rows) on a table during a table clone operation
I'm trying to alter some heavy data tables tables, this operation may cause some impact on our production service, so to minimize outages the plan is:
create a copy table that inherits table ...
2
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1
answer
233
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Not able to wrap values in quotes when exporting CQL table to CSV
I am not able to copy data into a CSV file and have them wrapped with single quotes:
e.g.
Table: myks.mytable
column1
column2
value1
value2
command used: copy myks.mytable (column1,column2) to '...
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How do I use COPY FROM on a backup file with multiple tables?
I used this command to backup my "supplies" table:
COPY supplies (id, price, ...) FROM 'C:\Users\MyCompany\Desktop\database03-01-2022.sql';
But now, I would like to write three more tables' ...
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1
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attribute 51 of type users has wrong type
I'm trying to import data to a pg table from a csv file. The error I get is:
$ psql -U postgres -c "COPY users (first_name) FROM '/users.csv' (FORMAT csv)"
ERROR: attribute 51 of type users ...
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1
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1
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unterminated CSV quoted field when to import csv data file into postgresql
Create a table :
CREATE TABLE num (
id serial NOT NULL ,
adsh VARCHAR(20) NOT NULL,
tag VARCHAR(256) NOT NULL,
version VARCHAR(20) NOT NULL,
coreg VARCHAR(256),
ddate date NOT ...
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2
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439
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Export colums containing (geo)JSON elements to CSV while keeping the JSON double quotes properly
I want to export using copy 5 columns of a table, 3 of them contain ID, text and timestamp values but 2 of them contain JSON and GeoJSON elements, e.g.:
// Please, note the non-quoted string Value1
/...
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1
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884
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Insert from select without losing progress in the middle by Postgresql? "INSERT INTO ... SELECT ... WHERE ... AND NOT EXISTS (...)"
Is it possible to move data to the new table sourcing other tables without losing progress in the middle?
I think of plpgsql that read data by chunks and commit after every N inserts... If the process ...
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1
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Why can't copy data into csv file with double quotes?
The data can be exported with single quote in copy command:
COPY mytest TO '/tmp/test.csv' DELIMITER ',' CSV HEADER;
COPY 5
With double quotes:
COPY mytest TO "/tmp/test.csv" DELIMITER ',' ...
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Error with non-standard identifier in \copy command [closed]
Would like to be able to add characters like '-' in the schema name when running COPY command in PostgreSQL. Any way to get around this?
psql -d postgres -c "\COPY (SELECT * FROM test-schema....
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How to quote arrays in postgres copy statement to insert into JSON field
I have some data that looks like this:
id,bo,c,url
1,"some text here", 22, "[{'id': 'NfKA3', 'u': 'https://somewebsite.com'}]"
2, "more text", 83, "[{'id': 'W3nAl', '...
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Most efficient method to import bulk JSON data from different sources in postgresql?
I need to import data from thousands of URLs, here is an example of the data:
[{"date":"20201006T120000Z","uri":"secret","val":"1765.756"},{...
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2
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postgresql copy comand with date in filename
I have a query and want the output in a .csv file with today's date and time in the name (I am using PostgreSQL v12).
COPY
(SELECT * FROM mytable)
TO 'C:\Users\me\mylocation\filename_date_time.csv' ...
10
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1
answer
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Postgres COPY with on conflict ignore - possible?
I want to add on conflict ignore to the Postgres copy command.
I know I can copy the data to a table without unique index /primary key and then use insert with the on conflict syntax.
But I wanted to ...
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3
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4k
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Postgres COPY with multiple small chunks
In postgres, we can do COPY to export the data into file. But all the data will be saved into a file. But I want to chunk that file into small files. We can do this after the export.
But is there a ...
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393
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Using COPY in Postgres
I know COPY is the best utility to export the data from a table or a query to output files. But if we are doing an export like
\COPY (select * from table) to '/tmp/file.csv' WITH CSV;
How its ...
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2
votes
1
answer
522
views
Load text column to postgres
I use the following to load data into postgres
\copy tab FROM /tmp/file DELIMITER E'\t' QUOTE E'\b' NULL AS '\N' CSV
Usually I select the data from a source db
echo "select * from tab" | ...
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1
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479
views
Why doesn't the $1 syntax work for all queries?
I tried to do this:
COPY postgres_log FROM $1 WITH csv;
And with a separately sent file path, like I make all normal queries (SELECT/UPDATE/INSERT/DELETE). However, it gives:
ERROR: syntax error at ...
user215888
3
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1
answer
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How to call from a shell program a postgresql COPY FROM FILE command, passing the path of the FILE as an argument?
I am trying to run, via a linux shell script, a Postgresql command that reads a CSV and updates a table with it.
The difficulty I am facing, is that this shell script has to pass an argument to the ...
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187
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Tuning postgres so it's optimized for bulk COPY imports [duplicate]
I am using the COPY command of Postgres to bulk insert data once a minute from an in-memory CSV file. I written the COPY code so that it performs the COPY's in parallel on separate db connections.
My ...
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PostgreSQL COPY - Generated columns cannot be used in COPY
Im trying to import a SQL dump file for a table (A COPY command dump file). The table has a generated column. While restoring the dump Im getting this error.
ERROR: column "call_status" is ...
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How to copy user rights and roles from one user to another
I require a PL/SQL script that copies all of a user's rights, roles and mandates from one user to another.
I am using Oracle 12c.
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3
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How to import multiple CSV files to a postgres table using pgadmin or other method?
I'm looking to import a folder of over 100+ csv files into one table on PostgreSQL using pgadmin. I have the following script but is there a way to change the file path to all csvs?
COPY schema.table ...
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Copy MySQL User but change HostName
I am migrating to a docker MariaDB setup and all my users were created w/ "Localhost". From what I read and tested ironically '%' excludes localhost. I want to copy my existing users adding a second ...
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1
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215
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vertica/postgres copy text to binary column
Until now I used Oracle to store xml file in blob data type column.
Is there any option in Vertica to copy xml file into binary column?
I saw there is varbinary data type but, I haven't succeeded to ...
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2
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265
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COPY Command spawning multiple processes
I have a lengthy data pipeline that imports a CSV, creates a sequence of dependent views and then exports the results using COPY as a CSV. This process had been working fine, completing in around 30-...
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MS SQL 2008 R2 - How to use a production database through dev/test environments or how to copy a SQL schema and all its data to another
We currently have 3 Windows Server 2008 R2 VM identically build for Sage x3 v6.5, one for production/formation/budget database, a second one for QA (qualification) and a third one for dev & tests. ...
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199
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Firebird begin backup and forced writes off, timestamp update delayed
We have a Firebird database that's almost 200 Gbyte in sice, and for performance we have forced writes off. Please don't debate the risks of forced writes, we are aware of them. This is Firebird 3.0.4 ...
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2
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789
views
Large database backup files integrity check after or before copy
I was trying to copy large database backup files(appx. 2TB each) to different region using robocopy. But I have noticed the speeds are drastically slow when using the switch /Z. So I have removed this ...
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148
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PostgreSQL dump distinct column without memory consumption
I'm trying to dump csv of distinct varchar(43) column to file, table has around billion rows, select distinct command either runs out of memory and command is aborted or server just closes all ...
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Importing plain (raw) files into a postgres table (bytea and large objects)
What is a good way to insert/copy plain files into a postgres table, preferrably using the psql command-line?
In my case the files are a bunch of eMails from Maildir archives, so I tried to use COPY: ...
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1
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980
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PostgreSQL Copy command internals
I need to know some internals about the copy command in PostgreSQL 10.
In particular I need to know if the copy from into a remote database makes batch insertions. If so, what is the default ...
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186
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Is it possible to load data into Postgres using COPY, where the data includes a SELECT statement?
(I think the answer is probably "no", but I haven't managed to find anything where anyone tried to do this. Which maybe is a sign in itself).
So, I have a parent and child table than I'm generating ...
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1
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683
views
Can we copy data from 1 text file to 2 postgresql tables?
I have a text file with some data and I have two similar tables in my postgresql database. Is it possible to copy a part of the data present in the file, say first 10 lines, to the first table and the ...
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views
Can copy command in postgresql append data to a file? [duplicate]
I want to add some data from a postgresql table to a text file. But already some data is present in the file. I do not want to delete that data. Is it possible?
The questions asked earlier were the ...
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2
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234
views
Can't see process progress, machine getting slow trying to import 500 million records
Working environment:
PostgreSQL 12.0, Ubuntu 18.10, 4GB memory, i5-3230M CPU @ 2.60GHz × 4, Os 64 bits
I'm trying to import a .csv file with more than 500 million records into a PostgreSQL db table, ...
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1
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2k
views
Parse a unix/epoch value as a `TIMESTAMP` in PostgreSQL
PostgreSQL's COPY command is useful to quickly import lots of data, and the data must be in the textual representation for the datatype.
I am importing lots of data, includes a timestamp column, but ...
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1
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5k
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Improve speed of COPY COMMAND in postgres
I would like to understand if increasing work_mem does help improving the speed of the COPY command.
Does COPY use work_mem or maint_work_mem extensively?
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120
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Copy Data from Two different databases with FK relation
So the situation is as follow:
I have production DB called DB1 which has huge data, around 250 GB.
I have Test DB called DB2 on my local machine which has the same schema as the production DB but ...
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102
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Get value from one field, and paste it in to a new column
I'm relatively new to Microsoft Access, and just a beginner with SQL programming.
I have a table in MS Access. It is an import from a .txt file. In the first column There is a String with a Number or ...
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4
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4k
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Copy table from one server to another including keys and indexes
I have been working on a small project for about two weeks.
We want to consolidate a few tables from several remote server databases in order to run queries and reports on separate from the live ...
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241
views
How to copy/export part of my SQL database
So I have this huge live SQL database. I want to do some testing so I thought to export it, however, it is around 200 GB which is impossible to export.
I thought maybe I export the schema of it and ...
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3
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3k
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Postgres \copy command into single column without delimiter
I am trying to import big fixed length files into Postgres and I am using the copy command and a staging table following this guide.
The problem is that this files has a lot of different characters ...
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1
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4k
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The simplest way to copy sql tables from one database to another?
So I have been logged into two different database. I want to copy one table from the first database to the other one with its content. I want to overwrite the content of the destination one (Because I ...
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regularly calculating data and then loading to production database
I have a Postgres database running a small website. Most of the tables in the database are calculated values derived from various input data. This input data is updated approximately monthly. The ...
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votes
1
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8k
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Fastest way to extract full table in Postgres
I'm trying to dump a table with 50M records to a file, and my goal is to reduce the time in which this action is performed. I usually use the COPY metrics TO 'metrics.csv' DELIMITER ',' CSV; This ...
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2
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Log Shipping Copy Job Fails once in a while
I have configured log shipping at multiple database server with monitored server(separate server) and all of them are running fine without any issues.
One particular server has 7 database and the ...
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3
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1
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840
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Best way to copy data to other location without blocking source
I have a production database with some data I need to copy to other location, either another database on the same server or another server.
The DB size is huge and I don't need all the data on the DB,...
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1
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2k
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SELECT vs COPY (SELECT) TO STDOUT
I need to read more rows than fit in memory, resonably fast. I see two options:
SELECT ... where my bindings use a cursor to stream the rows;
COPY (SELECT ...) TO STDOUT (FORMAT binary) where my ...
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2
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79
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Copying all columns of a row from table into another?
I would like to keep the history of a table using SQL queries without triggers. The simplest way to do that is to fire a SELECT and INSERT into the history table like below:
INSERT INTO history (...
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