句子大小写 SQL：正确的标识符无效

Question

我尝试参考和使用我发现的以下示例：

https://social.msdn.microsoft.com/Forums/sqlserver/en-US/3a170b84-a332-4553-bcc5-1e7a85bce8f1/display-data-first-letter-uppercase-rest-lowercase

http://sqlmag.com/t-sql/how-title-case-column-value

像这样：

V1:

SELECT DISTINCT upper(left(county,1))+lower(right(county,len(county)-1)) 
  as county     
  FROM tablename     
  order by county

V2:

UPDATE tablename
  SET county = UPPER(LEFT(county, 1)) + LOWER(RIGHT(county, LEN(county) - 1));

避免：

让 DISTINCT 填充相同但区分大小写的文本副本[我单独测试了 DISTINCT，它确实显示了副本]

我想做的是：

将文本显示为数据库中每个不同县值的句子

问题：

我面临的问题是 RIGHT 给我一个错误 Invalid identifier

有没有办法使用我的格式，但对 RIGHT 使用不同的值？

完整的 VB.net 代码块以填充下拉列表：

If Not County_List Is Nothing Then

   Dim County As OleDbCommand = New OleDbCommand("SELECT DISTINCT upper(left(county,1))+lower(right(county,len(county)-1)) as county FROM tablename order by county", conn)
   Dim OracleDataAdapterAds3 As OleDbDataAdapter = New OleDbDataAdapter
   OracleDataAdapterAds3.SelectCommand = County

   Dim DsAds3 As DataSet = New DataSet
   DsAds3.Clear()

      If Not (DsAds3 Is Nothing) Then
         OracleDataAdapterAds3.Fill(DsAds3, "tablename")
         County_List.DataSource = DsAds3
         County_List.DataMember = "tablename"
         County_List.DataBind()
         Dim newListItem As ListItem
         newListItem = New ListItem("", "")
         County_List.Items.Insert(0, newListItem)
         County_List.SelectedIndex = -1
     End If

End If

Answer 1

看来您正在使用 Oracle。 Oracle 没有 LEFT() 和 RIGHT()。相反，使用 SUBSTR():

SELECT DISTINCT upper(substr(county, 1, 1)) || lower(substr(county, 2)) as county     
FROM tablename     
ORDER BY county;

但是，您可能会发现 INITCAP()（参见 documentation）更符合您的喜好：

select distinct initcap(county) as county
from tablename
order by county;

句子大小写 SQL：正确的标识符无效

Sentence Case SQL: RIGHT invalid Identifier

sql

vb.net

case-sensitive

oracle10g