| # Licensed to the Apache Software Foundation (ASF) under one |
| # or more contributor license agreements. See the NOTICE file |
| # distributed with this work for additional information |
| # regarding copyright ownership. The ASF licenses this file |
| # to you under the Apache License, Version 2.0 (the |
| # "License"); you may not use this file except in compliance |
| # with the License. You may obtain a copy of the License at |
| # |
| # http://www.apache.org/licenses/LICENSE-2.0 |
| # |
| # Unless required by applicable law or agreed to in writing, |
| # software distributed under the License is distributed on an |
| # "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| # KIND, either express or implied. See the License for the |
| # specific language governing permissions and limitations |
| # under the License. |
| |
| SELECT int_col AS result FROM test |
| WHERE int_col < 5 |
| UNION |
| SELECT int_col + 3 AS result FROM test |
| WHERE int_col < 5; |
| -- |
| +-----------+ |
| |result | |
| +-----------+ |
| | 2| |
| | 5| |
| | 0| |
| | 7| |
| | -2| |
| | -4| |
| | -6| |
| | -8| |
| | -10| |
| | -12| |
| | -14| |
| | -16| |
| | -18| |
| | -20| |
| | -1| |
| | -3| |
| | 4| |
| | -5| |
| | -7| |
| | -9| |
| | -11| |
| | -13| |
| | -15| |
| | -17| |
| | -19| |
| | -21| |
| | -23| |
| +-----------+ |
| == |
| |
| SELECT i + 1 AS result |
| FROM generate_series(1, 5) AS gs(i) |
| INTERSECT |
| SELECT i * 2 AS result |
| FROM generate_series(1, 5) AS gs(i) |
| -- |
| +-----------+ |
| |result | |
| +-----------+ |
| | 2| |
| | 4| |
| | 6| |
| +-----------+ |
| == |
| |
| SELECT float_col FROM test |
| WHERE int_col < 5 |
| ORDER BY int_col DESC |
| LIMIT 5 |
| UNION ALL |
| SELECT float_col FROM test |
| WHERE int_col < 5 |
| ORDER BY int_col DESC |
| LIMIT 10 |
| -- |
| +---------------+ |
| |float_col | |
| +---------------+ |
| | 2| |
| | 1.41421354| |
| | 1| |
| | 1.73205078| |
| | 2.23606801| |
| | 2.64575124| |
| | 3| |
| | 3.31662488| |
| | 3.60555124| |
| | 3.87298346| |
| | 2| |
| | 1.41421354| |
| | 1| |
| | 1.73205078| |
| | 2.23606801| |
| +---------------+ |