Cannot get ODBC Data Source to connect on report server Hi. [Microsoft][ODBC Driver Manager]. (TNS Service Name = ORCL and User ID = scott). Easysoft ODBC-ODBC Bridge Performance White Paper. ODBC data sources. A data source name is a. with a data source name. In Windows the driver manager needs. The ADO Object Model. based on the ODBC Data Source Name. [Microsoft][ODBC Driver Manager] Data source name not found and no default driver specified.
Shahriar N. K. • Project Manager. Embedding SQL in C# and Java. This article describes in complete detail how to connect to a MS SQL Server database from C#. NET database application as well as a Java database application.
Getting Started With DB2 App Dev p2. An ODBC Driver Manager will load the. Figure 3.12 shows the corresponding Java source code. 104 Getting started with DB2.
It also describes how to pass embedded SQL queries (SELECT, INSERT, UPDATE, DELETE), calling stored procedures, pass parameters and much more. The article is actually a part of the document that made the project report for my undergraduate degree. The purpose of the project was to investigate how SQL is embedded in C#. NET database applications as well as Java database applications. Part of the project was to implement a working prototype database application with C#. NET and also Java to further investigate the result of the research work. If you have any queries you may contact me at info@shahriarnk.
Introduction. Embedding SQL in C#. NET database application. Data Access Technologies. ADO. NETThe . NET Framework data providers. Connecting to a data source (MS SQL Server Database)Creating a SQL command (Pass SQL queries, call Stored Procedures etc.)Executing a SQL command. Passing parameters to queries/commands. Calling stored procedures.
Embedding SQL in Java database application. The JDBC APIConnecting to a data source (MS SQL Server Database)Driver. Manager Class. Querying the data source (Pass SQL queries, call Stored Procedures etc.) Result.
Set Object. Manipulating data in a data source programmatically (without SQL)Accessing data without SQL in C#. NET database application. Accessing data without SQL in Java database application. Appendix ATable. 1: Java Types Mapped to JDBC Types.
Table. 2: JDBC Types Mapped to Java Types. Appendix BTable: Mappings between SQL Server, JDBC, and Java programming language data types. Appendix CTable: Conversions by Result. Set. get. XXX Methods from JDBC Types (to Java Types)References. Bibliography. Related articles on this site. SQL or Structured Query Language is a programming language used by the popular database management systems (DBMSs) to store, manipulate and retrieve any data in the database.
It has been standardized for any one who wants to use SQL as the language for storing and manipulating data in a database. Embedding SQL is the process of sending ‘pure’ SQL statements or queries directly to the database from a programming language such as Java, referred to as the ‘host language’, to perform actions in the database. Pure SQL’ in this case means that the SQL statement/query sent must follow the exact SQL syntax as defined by the SQL standard or the syntax supported by the DBMS which is the same as the international standard (but sometimes not) . In other words, embedding SQL enables placing SQL statements directly into the logic of the program or application.
The only other way applications can interact with data in the database is by using functions and procedures provided by the host languages (i. SQL statement). Why Embed SQLThe only purpose SQL was built for is to interact with the database. Hence, it constructs were designed to be intuitive for raw data manipulation, for e. CREATE TABLE’, ‘SELECT FROM EMPLOYEE TABLE’ etc. It also enables the creation of manipulation of database optimizers such as indexes which are necessary for any real database. These are just a few of the SQL functionalities. On the other hand, a language such as Java was created for a range of purposes wider than the scope of a database.
Hence, functions or procedures native to the host language, inherently fall short of SQL either in their functionality or flexibility. Embedding SQL produces programs that are easy to understand as the queries are ‘inside’ the program.
The produce more efficient applications too. The . NET framework is the foundation for several programming languages provided by Microsoft including C# (or Visual C#. NET) and Visual Basic. NET. It provides three data access technologies: ADO. NET, ADO, and OLE DB. ADO. NET is the strategic application- level interface for providing data access services in the Microsoft .
NET Platform. In practice, ADO. NET is a set of classes that expose data access services to the . NET programmer. ADO.
NET supports a variety of development needs, including the creation of front- end database clients that have SQL embedded in them. For applications written in native code, ADO provides a COM- based application- level interface for OLE DB data providers.
OLE DB is the strategic system- level programming interface for accessing data, and is the underlying technology for ADO as well as a source of data for ADO. NET. OLE DB is an open standard for accessing all kinds of data — both relational and non- relational data including: mainframe ISAM/VSAM and hierarchical databases; e- mail and file system stores; text, graphical, and geographical data; and custom business objects. ADO. NET classes were used to implement the prototype C#. NET database application used to investigate the concept of embedding SQL in C#. NET. ADO. NET provides several ways to access data.
Datasets which are in- memory cache of records are used to manipulate data while being disconnected from the data source. It uses XML- based persistence and transmission format which maximises data sharing between multiple sources and applications. As an alternative, ADO. NET provides data commands and data readers to communicate directly with the data source. Direct database operations include running queries and stored procedures, creating database objects, and performing direct updates and deletes using DDL commands. Most of these operations can be performed using embedded SQL. Data sources are accessed by ADO.
NET using the . NET Framework data providers (described in the next section). Table below presents a comparison between the two strategies for data access. Table: Data Access Strategies in C# required for embedding SQL in C#.
NET database applications. Advantages of Dataset. Advantages of staying connected. Can contain multiple tables of results and can work with the tables individually or navigate between them as parent- child tables. Extra functionality such as executing DDL commands. Dataset tables can store data from different sources such as different databases, from XML files, spreadsheets, etc., all in the same dataset. In the dataset, they can be manipulated in a homogeneous format.
More direct control over how and when an SQL statement or stored procedure is executed and what becomes of the results or return values. Data can be easily moved between the different tiers of an application. Reduced application overhead as records don’t need to be stored in memory as in datasets. Especially important in cases such as making a search and simply displaying the results. Provides a powerful way to exchange data with other components of an application and with other applications. Less programming in some instances such as web applications. Data in a dataset is easy to bind with controls.
A dataset allows working with the same records repeatedly without requerying the database. When working with a dataset, a class file can be generated that represents its structure as an object (a Customers class for a Customers table) making programming them easy.
Recommendations for Accessing Data in C#. NET database applications: C#. NET Web Forms database applications: In general, use data commands.
Because Web Forms pages and their controls and components are recreated each time the page makes a round trip, it often is not efficient to create and fill a dataset each time, unless data is to be cached between round trips. Datasets may be used when the C#.
NET Web Forms application is accessing data from different tables or different data sources. Exchanging data with another application or a component such as an XML Web service. Need to perform extensive processing with each record you get from the database. Web Forms applications are good candidates for using embedded SQL statements.
C#. NET Windows Forms database applications: In general, in a Windows Form, use a dataset.