The following code examples show how to use data modification statements.

Procedure for Updates

Use SQLExecDirect to execute data manipulation statements and use the SQLRowCount function to obtain the affected rows.

INSERT

To insert updates:

SQLAllocHandle(SQL_HANDLE_ENV, SQL_NULL_HANDLE, &henv); 
SQLSetEnvAttr(henv, SQL_ATTR_ODBC_VERSION, (void*)SQL_OV_ODBC3, 0); 
SQLAllocHandle(SQL_HANDLE_DBC, henv, &hdbc); 
SQLDriverConnect(hdbc, 0, (SQLCHAR*)"Dsn=CData Workday Source;", SQL_NTS, 0, 0, 0, 0);
SQLExecDirect(hstmt, (SQLCHAR*)"INSERT INTO [CData].[Human_Resources].Workers (Legal_Name_Last_Name) VALUES ('Jon Doe')", SQL_NTS);  
SQLINTEGER  rowCount = 0;
SQLRowCount(hstmt, &rowCount);

UPDATE

To retrieve updates:

SQLAllocHandle(SQL_HANDLE_ENV, SQL_NULL_HANDLE, &henv); 
SQLSetEnvAttr(henv, SQL_ATTR_ODBC_VERSION, (void*)SQL_OV_ODBC3, 0); 
SQLAllocHandle(SQL_HANDLE_DBC, henv, &hdbc); 
SQLDriverConnect(hdbc, 0, (SQLCHAR*)"Dsn=CData Workday Source;", SQL_NTS, 0, 0, 0, 0);
SQLExecDirect(hstmt, (SQLCHAR*)"UPDATE [CData].[Human_Resources].Workers SET Legal_Name_Last_Name='Jon Doe' WHERE Legal_Name_Last_Name='Morgan')", SQL_NTS);  
SQLINTEGER  rowCount = 0;
SQLRowCount(hstmt, &rowCount); 

DELETE

To delete updates:

SQLAllocHandle(SQL_HANDLE_ENV, SQL_NULL_HANDLE, &henv); 
SQLSetEnvAttr(henv, SQL_ATTR_ODBC_VERSION, (void*)SQL_OV_ODBC3, 0); 
SQLAllocHandle(SQL_HANDLE_DBC, henv, &hdbc); 
SQLDriverConnect(hdbc, 0, (SQLCHAR*)"Dsn=CData Workday Source;", SQL_NTS, 0, 0, 0, 0);
SQLExecDirect(hstmt, (SQLCHAR*)"DELETE FROM [CData].[Human_Resources].Workers WHERE Id='0e44c92412d34b01ace61e80a47aaf6d')", SQL_NTS);  
SQLINTEGER  rowCount = 0;
SQLRowCount(hstmt, &rowCount);