大约有 9,000 项符合查询结果(耗时:0.0260秒) [XML]

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How do I specify a password to 'psql' non-interactively?

...ll script and one thing I've hit a road block with passing a password to psql . Here is a bit of code from the shell script: ...
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How to have an automatic timestamp in SQLite?

I have an SQLite database, version 3 and I am using C# to create an application that uses this database. 7 Answers ...
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How to show all privileges from a user in oracle?

...lease tell me how to show all privileges/rules from a specific user in the sql-console? 6 Answers ...
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Fastest way to get the first object from a queryset in django?

...etting a LIMIT if you're gonna call get() in the end ? Let the ORM and the SQL compiler decide what's best for it's backend (for example, on Oracle Django emulates LIMIT, so it will hurt instead of helping). – lqc Jul 3 '12 at 7:55 ...
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MySQL “NOT IN” query

... NOT IN vs. NOT EXISTS vs. LEFT JOIN / IS NULL in MySQL MySQL, as well as all other systems except SQL Server, is able to optimize LEFT JOIN / IS NULL to return FALSE as soon the matching value is found, and it is the only system that cared to document this behavior. [...
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Access denied for user 'test'@'localhost' (using password: YES) except root user

I am facing problem with mysql non root/admin user, I am following the below steps for creating user and its privileges, correct me if i am doing wrong, ...
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Generate a random number in the range 1 - 10

... If you are using SQL Server then correct way to get integer is SELECT Cast(RAND()*(b-a)+a as int); Where 'b' is the upper limit 'a' is lower limit share ...
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What is “the inverse side of the association” in a bidirectional JPA OneToMany/ManyToOne association

...customer. So the customer seems to be the owner of the orders. But in the SQL world, one item will actually contain a pointer to the other. Since there is 1 customer for N orders, each order contains a foreign key to the customer it belongs to. This is the "connection" and this means the order "own...
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MySQL foreign key constraints, cascade delete

... When creating the tables, you need to specify InnoDB or another MySQL engine that's capable of CASCADE operations. Otherwise the MySQL default, MyISAM, will be used and MyISAM does not support CASCADE operations. To do this, just add ENGINE InnoDB before the last ;. – ...
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Reorder / reset auto increment primary key

I have a MySQL table with an auto increment primary key. I deleted some rows in the middle of the table. Now I have, for example, something like this in the ID column: 12, 13, 14, 19, 20. I deleted the 15, 16, 17 and 18 rows. ...