大约有 3,620 项符合查询结果（耗时：0.0169秒） [XML]
Datatable vs Dataset
...
You can also run multiple SQL select queries in one SQLCommand and access each resultset in dataset.Tables[i]
– Jan
Dec 8 '17 at 10:31
...
Missing artifact com.microsoft.sqlserver:sqljdbc4:jar:4.0
I am trying to add MS SQL driver dependency in my POM.xml file and the following is the dependency.
10 Answers
...
What is the difference between MySQL Server and MySQL Client
...tall both but what are the differences between the client and server for MySQL.
3 Answers
...
Java 8 stream reverse order
...it wrong anyway. Dump it into a DB and get a reversed stream using regular SQL.
– Cubic
Oct 3 '19 at 13:13
...
MySQL, better to insert NULL or empty string?
...
Better to Insert NULL for consistency in your database in MySQL. Foreign keys can be stored as NULL but NOT as empty strings.
You will have issues with an empty string in the constraints.
You may have to insert a fake record with a unique empty string to satisfy a Foreign Key constr...
GROUP_CONCAT ORDER BY
...
@aleroot, Is this query MySQL specific?
– Pacerier
Apr 30 '15 at 20:24
...
mysqli or PDO - what are the pros and cons? [closed]
In our place we're split between using mysqli and PDO for stuff like prepared statements and transaction support. Some projects use one, some the other. There is little realistic likelihood of us ever moving to another RDBMS.
...
What's the difference between session.Merge and session.SaveOrUpdate?
...class);
configuration.setProperty("connection.driver_class","com.mysql.jdbc.Driver");
configuration.setProperty("hibernate.connection.url", "jdbc:mysql://localhost:3306/hibernate");
configuration.setProperty("hibernate.connection.username", "ro...
When is it appropriate to use C# partial classes?
...and-written code that belong in the same class.
For example since LINQ to SQL uses partial classes you can write your own implementation of certain pieces of functionality (like Many-to-Many relationships) and those pieces of custom code won't get overwritten when you re-generate the code.
The sam...
How do you kill a Thread in Java?
...
I use method getConnection() from java.sql.DriverManager. If the connection attemt takes too long I try to kill the corresponding thread by calling Thread.interrupt() but it doesn't influence the thread at all. The Thread.stop() works however, although oracle says...