Sql 如何将多行查询成单行字符串结果?
假设我们有一个名为Sql 如何将多行查询成单行字符串结果?,sql,postgresql,string-aggregation,Sql,Postgresql,String Aggregation,假设我们有一个名为phrases的表,它的内容如下: 短语 期望的结果 +---------------------------------------------+ | sentence | +---------------------------------------------+ | the quick brown fox jumps over the lazy dog | +---------------------
phrases
的表,它的内容如下:
短语
期望的结果
+---------------------------------------------+
| sentence |
+---------------------------------------------+
| the quick brown fox jumps over the lazy dog |
+---------------------------------------------+
查询语句应该是什么样的,这样它将生成一个像上面那样的结果字符串?您可以使用空分隔符,也可以使用排序顺序
SELECT STRING_AGG(phrase , '' ORDER BY id) as sentence
FROM phrases;
SELECT STRING_AGG(phrase , '' ORDER BY id) as sentence
FROM phrases;