postgreSQL首字母大写的更新列

如何在postgreSQL中更新列只设置第一个字符大写

测试-->测试

我正在努力，但没有工作

UPDATE car SET carName=UPPER(LEFT(carName,1)) + LOWER(SUBSTRING(carName,2,LEN(carName)))

---

这不应该是个问题：

postgres=# select * from f10;
+--------+
|   a    |
+--------+
| nazdar |
+--------+
(1 row)

postgres=# update f10 set a = upper(substring(a from 1 for 1)) || lower(substring(a from 2));
UPDATE 1
postgres=# select * from f10;
+--------+
|   a    |
+--------+
| Nazdar |
+--------+
(1 row)

也许您也可以使用函数：

postgres=# select initcap('hello world');
+-------------+
|   initcap   |
+-------------+
| Hello World |
+-------------+
(1 row)

---

这不应该是个问题：

postgres=# select * from f10;
+--------+
|   a    |
+--------+
| nazdar |
+--------+
(1 row)

postgres=# update f10 set a = upper(substring(a from 1 for 1)) || lower(substring(a from 2));
UPDATE 1
postgres=# select * from f10;
+--------+
|   a    |
+--------+
| Nazdar |
+--------+
(1 row)

也许您也可以使用函数：

postgres=# select initcap('hello world');
+-------------+
|   initcap   |
+-------------+
| Hello World |
+-------------+
(1 row)