java - 为什么我不能在SQL中对许多表使用超过1个deleteRow()？我发现只有第一个rs的行被删除，其他的没有

Question

String SQL="Select * from APARTMENT_ADDONS";

String SQL2="Select * from APARTMENT_ID";

String SQL3="Select * from APARTMENT_AVAILABLE";

String SQL4="Select * from APARTMENT_COST";

stmt = con.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE,ResultSet.CONCUR_UPDATABLE);

stmt2 = con.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE,ResultSet.CONCUR_UPDATABLE);

stmt3 = con.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE,ResultSet.CONCUR_UPDATABLE);

stmt4 = con.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE,ResultSet.CONCUR_UPDATABLE);

rs=stmt.executeQuery(SQL);

rs2=stmt2.executeQuery(SQL2);

rs3=stmt3.executeQuery(SQL3);

rs4=stmt4.executeQuery(SQL4);

rs.deleteRow();

rs2.deleteRow();

rs3.deleteRow();

rs4.deleteRow();

Answer 1

ResultSet.deleteRow() 仅删除结果集的当前行。如果您想删除多个，请运行以下命令:-

String sql = "DELETE FROM MyTable WHERE Whatever = 'Something'";
stmt.executeUpdate(sql);

(当然最好使用PreparedStatements)。