rowcount

问题 All, I have recently had a problem where the visuals of a DataGrid were not updating when the selected rows were scrolled (WPF DataGrid Column Becoming Corrupt when using Multi-Selection) which was solved using the method in the linked answer. I have a TextBlock in a StatusBar and I bind this to an IsSelected property to the required ViewModel. I thought that a solution to the question above would also solve the fact that the selected row count was not being updated correctly; that is, it

问题 I am trying to get the row count and column count of all the tables in a schema in sql server using spark sql. when I execute below query using sqoop, it's giving me the correct results. sqoop eval --connect "jdbc:sqlserver://<hostname>;database=<dbname>" \ --username=<username> --password=<pwd> \ --query """SELECT ta.name TableName , pa.rows RowCnt, COUNT(ins.COLUMN_NAME) ColCnt FROM <db>.sys.tables ta INNER JOIN <db>.sys.partitions pa ON pa.OBJECT_ID = ta.OBJECT_ID INNER JOIN <db>.sys

问题 Hi again people of stackoverflow. I have a routine that has a step that I find unnecessary lets say you want to get all the images from a gallery, and limit a certain number of images per page. $db = PDO object $start = (pagenum x images per page) $limit = (images per page) $itemsdata = $db->query("SELECT id,name FROM gallery LIMIT $start,$limit")->fetchAll(); $numitems = $db->query("SELECT id FROM gallery")->rowCount(); $imgsdata is a array of all the images in a gallery for example.

问题 Can any one tell me how to find row count from OracleDataReader in .net 2.0? 回答1: An OracleDataReader object represents a forward-only, read-only, in-memory result set. Unlike the DataSet , the OracleDataReader object stays connected and fetches one row at a time. So, it does not know how many rows there will be. If you use the data adapter, then you will be able to get a row count since it fetches the rows. In your case you have to fetch all the rows (if you need to fetch the data only) to

问题 Ayende describes a really great way to get page count, and a specific page of data in a single query here: http://ayende.com/blog/2334/paged-data-count-with-nhibernate-the-really-easy-way His method looks like: IList list = session.CreateQuery("select b, rowcount() from Blog b") .SetFirstResult(5) .SetMaxResults(10) .List(); The only problem is this example is in HQL, and I need to do the same thing in an ICriteria query. To achieve the equivalent with ICriteria, I need to do something like:

问题 Post-answer edit: I think this was a bug in my own code -- I don't know what it was but I proceeded to fix it. See answer below. I'm using MySQL/PHP to perform a series of INSERT ... ON DUPLICATE KEY UPDATE statements. The documentation I've read indicates that the row count for this will return: -1 : an error 0 : update, no changes to row made (i.e. all values duplicated) 1 : row inserted 2 : update performed on row with duplicate key However, I'm only seeing results of 0s where I should be

问题 Hello you all How can i get row count of ObjectDataSouce ? I use ObjectDataSource and DataList . I want show some thing to the user for example in a label when there are certain row returned by ObjectDataSource . One of situation is when there is no record . Thank you . 回答1: I was looking for the same answer... Another solution I ended up using is the following: This is found on a .vb file behind an .aspx page. It handles the "selected" event of the datasource. Protected Sub ObjectDataSource1

问题 I'm working with python2.6 and MySQLdb. I have a table with this data +----+--------+ | id | status | +----+--------+ | 1 | A | | 2 | B | | 3 | B | +----+--------+ I want to do an mysql update like this example: UPDATE my_table SET status = "A" where id in (1,2,3,10001); Query OK, 2 rows affected (0.03 sec) Rows matched: 3 Changed: 2 Warnings: 0 And I need to know if all the ids in the update exits in the database. My idea to get this information was to compare the number of items I tried to

问题 I'm trying to create a procedure in SQL Server 2008 that inserts data from a temp table into an already existing table. I think I've pretty much figured it out, I'm just having an issue with a loop. I need the row count from the temp table to determine when the loop should finish. I've tried using @@ROWCOUNT in two different ways; using it by itself in the WHILE statement, and creating a variable to try and hold the value when the first loop has finished (see code below). Neither of these

问题 Using Excel Interop, you can get the count of rows in use by a sheet like so: _xlSheet.UsedRange.Rows (where "_xlSheet" is an Excel.Worksheet). What is the equivalent in Spreadsheet Light? You can add a worksheet like so: var sl = new SLDocument(); . . . sl.AddWorksheet("SheetsToTheWind"); ...but how can you then access that worksheet to interrogate it for its used row count? 回答1: After adding the worksheet it is active as well. That means that you can get the WorksheetStatistics from the