2025/11/27 -Counting the rows of a ResultSet is often not straightforward because the JDBC API doesn't expose a direct method for retrieving the row count. It loads the row ...
2026/9/2 -Instead, you can either count the rows by iterating through the result set or get the number of rows by submitting a query with a COUNT column in the Select ...
2026/4/6 -Step 6: Use ResultSetMetaData methods ... Access column details (count, name, type, etc.) int count = rsmd.getColumnCount(); String name = rsmd.getColumnName(1);
2026/8/24 -To determine if more result sets are available, you can call the getMoreResults method, which returns a boolean value of true if more result sets are available.
2026/10/12 -ResultSet を最後まで読んで数えるより、SQL の COUNT(*) を使います。 ... COUNT(*) は該当が0件でも、0 という値の1行を返すので、 next() は true になります。
Use executeQuery for SELECT queries (returns a ResultSet) and ... count). #Java #JDBC #ExecuteQuery #ExecuteUpdate #Database.
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2026/10/24 -true means the first result is a ResultSet . Get it with getResultSet() . false means the first result is an update count. Get it with getUpdateCount() .
2026/10/7 -The maximum number of threads the client uses to fetch rows from the server per Result Set, as defined in the official JDBC documentation. In this context, a ...
2026/8/3 -Gives the JDBC driver a hint as to the number of rows that should be fetched from the database when more rows are needed for ResultSet objects genrated by this ...
2026/4/13 -sql.PreparedStatement#execute() . Return. Boolean — true if the first result is a result set; false if the first result is an update count or there is no result ...