Which is better DataSet or DataReader?
Which is better DataSet or DataReader?
DataReader provides faster performance, but has read-only and forward-only access. DataSet, on the other hand, is high resource-consuming, but offers more control and a disconnected nature. If you want random access and do not need to worry about having a constant connection with the database, go with DataSet.
When should I use DataReader and DataAdapter?
Using the DataReader can increase application performance both by retrieving data as soon as it is available, and (by default) storing only one row at a time in memory, reducing system overhead. A DataAdapter is used to retrieve data from a data source and populate tables within a DataSet.
What are the differences between using SqlDataAdapter vs SqlDataReader for getting data from a DB?
A SqlDataAdapter is typically used to fill a DataSet or DataTable and so you will have access to the data after your connection has been closed (disconnected access). The SqlDataReader is a fast forward-only and connected cursor which tends to be generally quicker than filling a DataSet/DataTable.
Is DataReader faster than DataTable?
It was generally agreed that a DataReader is faster, but we wanted to see how much faster. The results surprised us. The DataTable was consistently faster than the DataReader. Approaching twice as fast sometimes.
Can we use DataReader in Web services?
Since a DataReader requires a persistent database connection, it cannot be used as a return type from a Web service.
Which is better in respect of performance DataReader and DataAdapter )?
SqlDataReader will be faster than SQlDataAdapter because it works in a connected state which means the first result is returned from query as soon as its available ..
What is the difference between DataReader and DataAdapter in Ado net?
DataReader is used to read the data from database and it is a read and forward only connection oriented architecture during fetch the data from database. DataAdapter will acts as a Bridge between DataSet and database. This dataadapter object is used to read the data from database and bind that data to dataset.
What is difference between DataTable and DataAdapter?
DataTable is mainly used to fetch and hold the records of one single table into memory. A DataAdapter is used to populate DataTable from records returned from an SQL statement and also a DataTable can be created in memory and data can be added to it.
How many number of records in memory at any given point of time when the DataReader reads the data?
A DataReader is a read-only stream of data returned from the database as the query executes. It only contains one row of data in memory at a time and is restricted to navigating forward only in the results one record at a time.
Which object in Ado net is similar to the recordset object of Ado?
data table
The data table is similar to the recordset object that is found in ADO. Using this object, you can filter and sort your data, keeping various views of the data.
What is DataReader in VB net?
DataReader is a readonly, forward only and connected recordset from the database. In DataReader, database connection is opened until the object is closed unlike DataSet. Using DataReader we can able to access one row at a time so there it is not required storing it in memory.
What is difference in record set and dataset?
Recordset provides data one row at a time. Dataset is a data structure which represents the complete table data at same time.
What is difference between DataSource and dataset?
They are not the same, The datasource is where you are pulling your data from – eg SQL Server, Oracle etc The dataset is the actual data you pull ie your query or tables
What is the difference between data adapter and data reader?
DataReaders provide multiple asynchronous methods that can be employed.
Is there any difference between dataset and database?
Data are observations or measurements (unprocessed or processed) represented as text,numbers,or multimedia.
