DECLARE @strs NVARCHAR(100) = N‘adgtryaserfg‘
计算字符串中各个字符出现的次数，当然也可以计算某一字符出现的次数了。
解决这个问题，可以参考这篇《拆分字符串存入表中》https://www.cnblogs.com/insus/p/10836310.html
DECLARE @strs NVARCHAR(100) = N‘adgtryaserfg‘ SELECT [Char], COUNT([Char]) AS [Quantity] FROM [dbo].[tvf_SplitStringToTable](@strs) GROUP BY [Char]
如果想字符"r"在字符串出现的次数，可以这样写SQL语句：
DECLARE @strs NVARCHAR(100) = N‘adgtryaserfg‘ SELECT COUNT([Char]) AS [Quantity] FROM [dbo].[tvf_SplitStringToTable](@strs) WHERE [Char] = N‘r‘
原文：https://www.cnblogs.com/insus/p/10836433.html
