大约有 3,620 项符合查询结果(耗时:0.0153秒) [XML]

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Delete with Join in MySQL

... If you're making a better answer - at least you could make the SQL more readable. All the other SQL references in this question have capitalized keywords (except for one with 0 votes). I'm not sure why you reverted my edits. – Yehosef Apr 13 '15 a...
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NoSql Crash Course/Tutorial [closed]

I've seen NoSQL pop up quite a bit on SO and I have a solid understanding of why you would use it (from here, Wikipedia, etc). This could be due to the lack of concrete and uniform definition of what it is (more of a paradigm than concrete implementation), but I'm struggling to wrap my head aroun...
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Best way to store time (hh:mm) in a database

...ed to store some variant of days, hours and minutes; the Time data type in SQL Server only goes up to 23:59:59 so we couldn't use that. Inspired by your answer we decided to have three int columns for days: hours: mins for maximum flexibility. thanks! – matao J...
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how to check and set max_allowed_packet mysql variable [duplicate]

... max_allowed_packet is set in mysql config, not on php side [mysqld] max_allowed_packet=16M You can see it's curent value in mysql like this: SHOW VARIABLES LIKE 'max_allowed_packet'; You can try to change it like this, but it's unlikely this will wo...
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Oracle “Partition By” Keyword

...xample of it in action, as well as why one would want to use it? I have a SQL query written by someone else and I'm trying to figure out what it does. ...
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java.sql.SQLException: Incorrect string value: '\xF0\x9F\x91\xBD\xF0\x9F…'

... and one will see squares if you are not using fonts that support them. MySQL's utf8 only supports basic multilingual plane, and you need to use utf8mb4 instead: For a supplementary character, utf8 cannot store the character at all, while utf8mb4 requires four bytes to store it. Since utf8 ca...
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Select count(*) from multiple tables

... @Stéphane: this happens when you try Oracle code on PostgreSQL. Lose the FROM dual. – Quassnoi Feb 3 '16 at 12:52  |  show 7 m...
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Create PostgreSQL ROLE (user) if it doesn't exist

How do I write an SQL script to create a ROLE in PostgreSQL 9.1, but without raising an error if it already exists? 10 Answ...
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What is the difference between SqlCommand.CommandTimeout and SqlConnection.ConnectionTimeout?

Is there any difference between SqlCommand.CommandTimeout and SqlConnection.ConnectionTimeout in .NET? 6 Answers ...
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How do you search an amazon s3 bucket?

...re traditional datastores that offer a (SELECT * FROM ... WHERE ...) (in a SQL model). What you will need to do is perform ListBucket to get a listing of objects in the bucket and then iterate over every item performing a custom operation that you implement - which is your searching. ...