If the starting position is larger than length of the first string, a null string is returned. If the start position is 0, a null value is returned. 六,其他字符串函数 函数ASCII(character_expression) 和 UNICODE(character_expression) 用于获取第一个字符的编码,根据整数编码,通过函数CHAR(code)和N...
tsql LastIndexOf ALTERFUNCTION[dbo].[LastIndexOf](@stringValueasnvarchar(1000),@stringSearchasnvarchar(1000))returnsintASBEGINDECLARE@lastindexintSET@lastindex=0DECLARE@tempindexintwhile(1=1)beginSET@tempindex=charindex(@stringSearch,@stringValue,@lastindex+1)if(@tempindex=0)breakSET@lastindex=@te...
Stuff函数从字符串指定的开始位置,删除指定长度的字符串,并从该位置插入新的字符串。 It deletes a specified length of characters in the first string at the start position and then inserts the second string into the first string at the start position. STUFF ( character_expression , start , length ...
tsql LastIndexOf FUNCTION.[LastIndexOf](@stringValueasnvarchar(1000),@stringSearchasnvarchar(1000))returnsintASBEGINDECLARE@lastindexintSET@lastindex=0DECLARE@tempindexintwhile(1=1)beginSET@tempindex=charindex(@stringSearch,@stringValue,@lastindex+1)if(@tempindex=0)breakSET@lastindex=@tempindexendR...
theString, location + group6_Offset + 1)), 0) as group6_Index, nullif(sign(charindex(substring(theString, location, group5_offset + 1), theString, location + group5_Offset + 1)), 0) as group5_Index, nullif(sign(charindex(substring(theString, location, group4_offset + ...
"String or binary data would be truncated" and field specifications “Unable to enlist in the transaction” with Oracle linked server from MS SQL Server [<Name of Missing Index, sysname,>] in non clustered index [Execute SQL Task] Error: The value type (__ComObject) can only be converted...
PATINDEX( findTextData, textData ) –It returns the starting position integer value of text found in the string. REPLICATE(character_expression, integer_expression ) –It repeats a character expression a specified number of times. RTRIM( textData) –Removes trailing blanks. SPACE( number of space...
In this case, the wait stats "ASYNC_NETWORK_IO" took the almost time, indicating that the main cause was downloading the data from SQL Server to SQL Server Management and we need to improve our network, reducing the number of rows or query the informatio...
Although it might not have an impact in this code it may in other examples where the string is being dynamically created for this kind of thing. Something to be aware of. DECLARE @sql NVARCHAR(MAX) DECLARE @params NVARCHAR(MAX) -- Build the basic query SELECT @sql = ' SELECT * FROM ...
vals.Idx = index; vals.Value = lineElements[index]; allVals.Add(new ReturnValues {Idx = vals.Idx, Value = vals.Value}); } } return allVals; } private struct ReturnValues { public int Idx; public string Value; } public static void FillRow(object row, out SqlInt32 idx, ...