Try this one: SQL 。 这些询问与最容易和最困难的不同。
Check out http://www.sqltree.com/ Also, some sample databases can be found here: http://msftdbprodsamples.codeplex.com/
我认为,你将在此找到大量材料:
http://www.compileonline.com/execute_sql_online.php”rel=“nofollow” http://www.compileonline.com/execute_sql_online.php。
希望这一帮助。
I noticed that there were some threads with similar questions, and I did look through them but did not really get a convincing answer. Here s my question: The subquery below returns a Table with 3 ...
I m 查询Oracle 10g。 我有两张表格(样本数据见下文)。 i m 试图提取一些领域
We have a restaurant table that has lat-long data for each row. We need to write a query that performs a search to find all restaurants within the provided radius e.g. 1 mile, 5 miles etc. We have ...
What are some cool SQL shorthands that you know of? For example, something I learned today is you can specify to group by an index: SELECT col1, col2 FROM table GROUP BY 2 This will group by col2
I have an array of output from a database. I am wondering what the cleanest way to filter the values is example array Array ( [0] => Array ( [title] => title 1 ...
we have a table in an Oracle Database which contains a column with the type Char(3 Byte). Now we use a parameterized sql to select some rows with a DBNull.Value and it doesn t work: OracleCommand ...
I have a SQL-statement like this: SELECT name FROM users WHERE deleted = 0; How can i create a result set with a running number in the first row? So the result would look like this: 1 Name_1 2 ...
I’m developing an application dedicated to generate statistical reports, I would like that user after saving their stat report they save sql queries too. To do that I wrote the following module: ...
