JDBC SQL Server联接不返回任何结果

Question

I'm converting an application that runs currently under MYSQL to use SQL Server. The upshot is, that I have an odd situation! The existing query works in MySQL via JDBC, and works inside MySQL as a command line query -- yet, the same query is not working via the SQL Server JDBC driver, despite working inside the SQL Server studio from the command line as a query.

Under MYSQL JDBC I get a set of results, under SQL Server JDBC I get 0 results.

I've tried the query this way (which works in SQL Server from the command line)

SELECT DISTINCT
    x,
    y
FROM
    table1,
    table2
WHERE
    x = y
AND start_date <= '2015-05-15'
AND end_date >= '2015-05-15'
AND direction LIKE 'Direction';

which inside JDBC looks like this:

"select DISTINCT x, y from table1, table2" +
                        "WHERE x=y and start_date <= ? and end_date >= ? and direction like ?"

Answer 1

The answer was that SQL Server needed the 'like' delimiting by % %. As in this example:

Using "like" wildcard in prepared statement

Our code worked fine with MySQL driver, but the drivers are obviously different in this respect. I've simplified the post in case anyone else gets this problem, and finds this post.