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    I am having day and time fields in database. I want to get the time-stamp by concatenating the day and time. How to do ... ' || Time)) > (e... See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    Is it possible in PostgreSQL to create a deferrable unique constraint on a character column, but case- ... way around this limitation? See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    Is there any function(s) in postgres equivalent to Oracle function LAST_DAY(). I need to get last day in postgres (including month and year) See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    I am trying to connect to my postgres database using psycopg2 with sslmode='required' param; however, I get the ... one that which python shows See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    I'd like to better understand Connection Pooling when using Npgsql for Postgres. (http://www.npgsql.org/) ... would be appreciated. Thanks. See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    I am converting an Unix script with a SQL transact command to a PostgreSQL command. I have a table with records ... discuss that in my answer. See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    I am using psql command to connect and issue a query on postgreSQL database. Can anybody let me know how to ... zero. Thanks for the help. See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    In Postgres: select 'test' || null returns null I was expecting it would otherwise return 'test'. Is this ... something that should be fixed? See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    I am working on a rails app. Installed Postgresql using postgresql-9.1.2-1-osx.dmg Installed pg gem. Then ... for this. Advice anyone please? See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    I'm using Alembic as migration tool and I'm launching the following pseudo script on an already updated ... exists before op.add_column. See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    I have four tables create table entities{ integer id; string name; } create table users{ integer id;//fk ... result have a better performance. See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    I want to set UTF8 for my PDO object. This class works correctly with MySQL. I can't find an analog of array(PDO:: ... => "SET NAMES UTF8") ); } See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    In PostgreSQL, what is the difference between a prepared statement and a SQL or PL/pgSQL function, in terms of their ... fooplan(3, 'ben'); See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    How can I find where Postgres 8.x database files are saved in Ubuntu 10.04 file system? See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    I want to use SELECT INTO to make a temporary table in one of my functions. SELECT INTO works in SQL but ... automatically like it does in SQL. See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    I have a field that has a max_length set. When I save a model instance, and the field's value is greater than ... there must be a better way. See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    I am working on AWS server + PostgreSQL. When I execute a query for creating the database I get an error: ... How can I resolve this issue? See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    I am trying GitHub Actions for CI with a Ruby on Rails application. My setup is with VM, not running the Ruby build ... ] %> test: <<: *default See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    So I have a table with a large dataset and this table has a three columns that I would like to drop. ... any related questions / articles ... See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    What would be the proper syntax used to run an update query on a table to remove all spaces from the values ... AdamNoel' I have like 30k rows See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    I have a postgres table that has the following fields start_date,duration duration contains any number of months, so to ... Hat 4.1.2-48) See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    I am learning about postgresql internals and I am wondering or postgresql B-tree index is actually classic B-tree ... keys or key-value pairs? See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    I am learning about postgresql internals and I am wondering or postgresql B-tree index is actually classic B-tree ... keys or key-value pairs? See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
0 votes
1.3k views
1 answer
    I want to use SELECT INTO to make a temporary table in one of my functions. SELECT INTO works in SQL but ... automatically like it does in SQL. See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
0 votes
1.0k views
1 answer
    I have a field that has a max_length set. When I save a model instance, and the field's value is greater than ... there must be a better way. See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
0 votes
1.4k views
1 answer
    I am working on AWS server + PostgreSQL. When I execute a query for creating the database I get an error: ... How can I resolve this issue? See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
0 votes
1.1k views
1 answer
    I am trying GitHub Actions for CI with a Ruby on Rails application. My setup is with VM, not running the Ruby build ... ] %> test: <<: *default See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
0 votes
1.1k views
1 answer
    So I have a table with a large dataset and this table has a three columns that I would like to drop. ... any related questions / articles ... See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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