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How can I time SQL-queries using PSQL?
Timing can be turned on with timing at the psql prompt (as Caleb already said). If you are on 8.4 or above, you can add an optional on/off argument to timing, which can be helpful if you want to be able to set timing on in.psqlrc – you can then set timing on explicitly in a script where plain timing would otherwise toggle it off
Can a PSQL command be written directly to a file?
The psql \\o command was already described by jhwist. An alternative approach is using the COPY TO command to write directly to a file on the server. This has the advantage that it’s dumped in an easy-to-parse format of your choice — rather than psql’s tabulated format.
How to load data from text file in PostgreSQL database?
This format treats backslash characters in text without any fuss. The default format is the somewhat quirky TEXT. Let consider that your data are in the file values.txt and that you want to import them in the database table myTable then the following query does the job
How to use O parameter in pgSQL command?
Use o parameter of pgsql command. Hope this helps you. ufgtoolspg=> COPY (SELECT foo, bar FROM baz) TO ‘/tmp/query.csv’ (format csv, delimiter ‘;’); ERROR: must be superuser to COPY to or from a file HINT: Anyone can COPY to stdout or from stdin. psql’s \\copy command also works for anyone. you can run it in this way:
How to tell the execution time of a PostgreSQL query?
In the MySQL command line interface, when you execute a query it will tell you how long the query took to execute after printing out the results. In the Postgres command line interface ( psql) it does not tell you.
How to check client side execution time in PSQL?
See also the manual for psql. If you want server-side execution times that don’t include the time to transfer the result to the client, you can set log_min_duration_statement = 0 in the configuration, then SET client_min_messages = log so you get the log info in the console. You can also use EXPLAIN ANALYZE to get detailed execution timings.
Is there way to declare variable in PSQL?
I found one solution to resolve this problem, that is PSQL Command line variable. You can declare the variable in the PSQL Session and can use for that session. The benefit of this is, you do not require to update .sql files for again and again, and multiple people can use same SQL script at a time for different schemas.