就像这样:
StringBuilder sb = new StringBuilder(5000);
sb.append("SELECT user_id FROM ").append(DEF_USERS_TBL).append(" WHERE user_id='").append(phoneBook.get(0)).append('\'');
for (int i = 1; i < phoneBook.size(); i++)
{
sb.append(" OR user_id='").append(phoneBook.get(i)).append('\'');
}
sb.append(';');
try
{
Statement s = ...;
rs = s.executeQuery(sb.toString());
...
} catch ( ... ) {
...
}
我听说对于MySQL ver&gt; 5.0,innoDB,如果这是一个存储过程,那将是有意义的,性能明智。如果我将其转换为phonebook.size()单个SELECT查询(因此,我可以存储程序),它会更快吗?
泰