datalength

In SQL Server 2005, what is the difference between len() and datalength()?

由 送分小仙女□ 提交于 2020-04-13 07:31:37
问题 What is the difference between len() and datalength() in SQL Server 2005? 回答1: DATALEN will return the number of bytes that are used to store the value: http://msdn.microsoft.com/en-us/library/ms173486(SQL.90).aspx LEN will return the number of characters in a string. Since a string can use single or double-byte characters, this differs from DATALENGTH in that you will always get 1, no matter how long a single character is: http://msdn.microsoft.com/en-us/library/ms190329.aspx 回答2: DATALENGTH

Length of varbinary(max) filestream on SQL Server 2008

由 ﹥＞﹥吖頭↗ 提交于 2020-01-13 09:51:52
问题 Is there some efficient way how to get length of data in "varbinary(max) filestream" column? I found only samples with conversion to varchar and then calling the "LEN" function. 回答1: SELECT length = DATALENGTH(Name), Name FROM Production.Product ORDER BY Name "Returns the number of bytes used to represent any expression." T-SQL and quote taken from MSDN's DATALENGTH (Transact-SQL) library. 来源： https://stackoverflow.com/questions/748165/length-of-varbinarymax-filestream-on-sql-server-2008

Length of varbinary(max) filestream on SQL Server 2008

由 徘徊边缘 提交于 2020-01-13 09:51:06
问题 Is there some efficient way how to get length of data in "varbinary(max) filestream" column? I found only samples with conversion to varchar and then calling the "LEN" function. 回答1: SELECT length = DATALENGTH(Name), Name FROM Production.Product ORDER BY Name "Returns the number of bytes used to represent any expression." T-SQL and quote taken from MSDN's DATALENGTH (Transact-SQL) library. 来源： https://stackoverflow.com/questions/748165/length-of-varbinarymax-filestream-on-sql-server-2008

Extended TYPE_NAME function that includes datalength

由 爷，独闯天下 提交于 2020-01-06 20:12:57
问题 I'm thinking of creating a function of the format FULL_TYPE_NAME(type_id, max_length) that returns both the datatype and length in string format eg.: FULL_TYPE_NAME (231,-1) would return: nvarchar(max) Before I do this I wanted to check if tsql already has such a function (I haven't found one) or whether some kind soul out there has a ready made one that I can use. If not, then I'll write one and post it here. Thanks in advance. 回答1: A rough start would be something like this: CREATE FUNCTION

Using entity framework, how do you select the datalength of a column plus other column data

由 给你一囗甜甜゛ 提交于 2019-12-24 14:00:59
问题 If I have a SQL table X with columns A and B, and I want to select the DATALENGTH of B, as well as column A, how do I do this in a single expression? For example: var results = dc.X.Select(x => SqlFunctions.DataLength(x.B)) will return me results containing a single column equal to B's length. What does this statement look like if I want to include A in the same result set? I've tried this, but it won't compile obviously: var results = dc.X.Select(x => new { SqlFunctions.DataLength(x.B), x.A

PDO fetch returns only first row [duplicate]

由 天大地大妈咪最大 提交于 2019-12-20 07:51:07
问题 This question already has an answer here : PHP PDO Data_length always returns “0” (1 answer) Closed 3 years ago . UPDATE 2: I kindly asked to unmark this question as duplicate as it is not a duplicate of the other question, which after some research I discovered the problem and provided an effective answer, which the person that marked my question as duplicate didn't provide stating that the code worked for him. Well, it is working for him, but it is not working for me. I also read many many

Difference between sp_spaceused and DataLength SQL Server

由 徘徊边缘 提交于 2019-12-09 18:41:01
问题 I have a table with single Row when i use SP_SpaceUsed N'<TableName>' it gives me data as 16 KB and when I use dataLength something like this:- select ClientID , (0 + isnull(datalength(ClientID), 1) + isnull(datalength(LeadID), 1) + isnull(datalength(Company_Name), 1) + isnull(datalength(Website), 1) + isnull(datalength(EmployeeCount), 1) + isnull(datalength(Revenue), 1) + isnull(datalength(Address), 1) + isnull(datalength(City), 1) + isnull(datalength(State), 1) + isnull(datalength(ZipCode),

What is the size of a image field content in SQL Server?

由 我们两清 提交于 2019-12-06 16:29:53
问题 I have a table in SQL Server. This table has an image field and the application stores files in it. Is there a way to read the size of the file in the image field using T-SQL? 回答1: SELECT DATALENGTH(imagecol) FROM table See MSDN 回答2: Different display styles: SELECT DATALENGTH(imagecol) as imgBytes, DATALENGTH(imagecol) / 1024 as imgKbRounded, DATALENGTH(imagecol) / 1024.0 as imgKb, DATALENGTH(imagecol) / 1024 / 1024 as imgMbRounded, DATALENGTH(imagecol) / 1024.0 / 1024.0 as imgMb FROM table

What is the size of a image field content in SQL Server?

由 北城以北 提交于 2019-12-04 22:12:51
I have a table in SQL Server. This table has an image field and the application stores files in it. Is there a way to read the size of the file in the image field using T-SQL? SELECT DATALENGTH(imagecol) FROM table See MSDN Different display styles: SELECT DATALENGTH(imagecol) as imgBytes, DATALENGTH(imagecol) / 1024 as imgKbRounded, DATALENGTH(imagecol) / 1024.0 as imgKb, DATALENGTH(imagecol) / 1024 / 1024 as imgMbRounded, DATALENGTH(imagecol) / 1024.0 / 1024.0 as imgMb FROM table Example output: imgBytes imgKbRounded imgKb imgMbRounded imgMb 68514 66 66.908203 0 0.065340041992 来源： https:/

PHP PDO Data_length always returns “0”

由 心不动则不痛 提交于 2019-12-02 14:43:10
问题 Well, I'm just trying the following for around two hours now and I can't get it to work. The following code will always return "0". Please, can anyone see where is the problem. This should work as a charm. And in PhpMyAdmin, when I run the statement it works correctly. Actually, this is a copy/pasted code from another question here on SO which was accepted as a working answer. Check it out here. EDIT: No errors are thrown using: error_reporting(-1); and PDO::ERRMODE_EXCEPTION . UPDATE:
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