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jy98huxhu 2002-09-19
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gz
CharmDream 2002-09-19
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up
workercxm 2002-09-19
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我也想知道！
zhangyilan 2002-09-19
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gz
sdb72 2002-09-19
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好像只有通过执行的方式
aben456 2002-09-19
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好象只能通过执行SQL的方法，EXECUTE没有返回的；建议使用OPEN，如上。
objectman 2002-09-19
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不同的数据库SQL有区别，怎么检验？？
qing_li73 2002-09-19
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Quick SQL Pass-Through Queries
The fastest way to work with ODBC data sources is via attached tables. See the article DAO External: Working with External Data Sources. For doing bulk operations, the best, and often fastest, approach is to use an SQL pass-through query. It’s possible to do a quick pass-through query using a recordset and without having to create a querydef, even a temporary one. This is also helpful if you’re converting existing code that uses the DB_SQLPASSTHROUGH option in many places.
DAO’s Connect property for databases normally doesn’t have a value for Microsoft Jet (.MDB) databases. But you can assign an ODBC connect string to the property and use the dbSQLPassthrough option in a recordset. This means you don’t have to open the ODBC data source directly to use SQL pass-through.
For example:
// pdb is a pointer to a CDaoDatabase object
// (an .MDB database)
// Set up the connect string
CString strConnect = "ODBC;DSN=ntstuff;UID=sa;PWD=Fred;APP=App Name;WSID=MyComputer;DATABASE=pubs;TABLE=dbo.authors;";
pdb->SetConnect( strConnect );
// Use SQL pass-through in a recordset
// Set up the SQL and open the recordset
CString strSQL = "whatever";
CDaoRecordset rs( pdb );
try
{
rs.Open( dbOpenSnapshot, strSQL, dbSQLPassThrough );
// ...
}
// ...
The fastest way to work with ODBC data sources is via attached tables. See the article DAO External: Working with External Data Sources. For doing bulk operations, the best, and often fastest, approach is to use an SQL pass-through query. It’s possible to do a quick pass-through query using a recordset and without having to create a querydef, even a temporary one. This is also helpful if you’re converting existing code that uses the DB_SQLPASSTHROUGH option in many places.
DAO’s Connect property for databases normally doesn’t have a value for Microsoft Jet (.MDB) databases. But you can assign an ODBC connect string to the property and use the dbSQLPassthrough option in a recordset. This means you don’t have to open the ODBC data source directly to use SQL pass-through.
For example:
// pdb is a pointer to a CDaoDatabase object
// (an .MDB database)
// Set up the connect string
CString strConnect = "ODBC;DSN=ntstuff;UID=sa;PWD=Fred;APP=App Name;WSID=MyComputer;DATABASE=pubs;TABLE=dbo.authors;";
pdb->SetConnect( strConnect );
// Use SQL pass-through in a recordset
// Set up the SQL and open the recordset
CString strSQL = "whatever";
CDaoRecordset rs( pdb );
try
{
rs.Open( dbOpenSnapshot, strSQL, dbSQLPassThrough );
// ...
}
// ...
dyw 2002-09-19
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最好通过Execute来检验
