大约有 3,551 项符合查询结果（耗时：0.0246秒） [XML]
How to ssh to vagrant without actually running “vagrant ssh”?
...ick if you need the host of your vagrant for ssh for other reasons, like a SQL GUI connection, such as Sequel Pro. This one save me!
– Atomox
Apr 6 '16 at 23:27
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How to drop a PostgreSQL database if there are active connections to it?
I need to write a script that will drop a PostgreSQL database. There may be a lot of connections to it, but the script should ignore that.
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Reset Entity-Framework Migrations
... In my case, the suggested command in this answer resulted in SQL errors.
– Justin Skiles
Jun 28 '14 at 22:39
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How to add multiple columns to a table in Postgres?
How do I add multiple columns in one query statement in PostgreSQL using pgadmin3?
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PHP method chaining?
...thing that should be done after collecting all elements. Like executing an SQL query here - but beware, you could do multiple chained calls on one object! Firt and last in each.
– Andris
Apr 4 '18 at 22:45
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MySQL COUNT DISTINCT
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I love SQL because you get questions like "How do I count distinct user IDs" and the answer is just "Count(Distinct user_id)"
– Tim
Nov 13 '18 at 15:29
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Create or write/append in text file
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Oh, yes there will be, in this case use a SQL database, it has a built-in engine to avoid race-conditions. But that's a whole new question.
– Valentin Mercier
Jul 26 '14 at 15:45
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How can I turn a List of Lists into a List in Java 8?
...))
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.collect(Collectors.toList())
This is would be similar in SQL to having SELECT statements within SELECT statements.
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Must JDBC Resultsets and Statements be closed separately although the Connection is closed afterward
...lph Stevens - You cannot count on that. I have had a situation where the MSSQL JDBC driver leaked memory because the ResultSet's were not closed, even after being garbage collected.
– Paul
Sep 8 '11 at 5:52
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PostgreSQL ERROR: canceling statement due to conflict with recovery
I'm getting the following error when running a query on a PostgreSQL db in standby mode. The query that causes the error works fine for 1 month but when you query for more than 1 month an error results.
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