[英]how to check if a query has affected a row or not in Java Netbeans Oracle
static void firequery(String q)
{
try {
query=q;
Class.forName ("oracle.jdbc.OracleDriver");/*driver*/
//System.out.println("call");
con = DriverManager.getConnection(dbUrl, "system", "demo");
stmt = con.createStatement();
rs = stmt.executeQuery(query);
System.out.println("FIRE!!!!!!!!");
} //end try
catch(ClassNotFoundException e) {
}
catch(SQLException e) {
e.printStackTrace();
}}
String s = "Delete from Ticket where tno='"+jnumber1.getText()+"'";
humarr_conn.firequery(s);
if(query has deleted any 1 row)
JOptionPane.showMessageDialog(null, "Deleted successfully");
else
JOptionPane.showMessageDialog(null, "Delete operation failed");
I'm not getting what would be my if condition? 我没有得到什么条件? I'm using Java as FrontEnd and Oracle as backend.
我使用Java作为FrontEnd和Oracle作为后端。
I want function like mysql_rows_affected of php like in java. 我想像java中的mysql_rows_affected这样的函数。
Hoping for quick and positive response. 希望得到快速和积极的回应。
Use executeUpdate(String sql)
instead. 请改用
executeUpdate(String sql)
。 It returns number of record changed by the query. 它返回查询更改的记录数。
See javadoc: http://docs.oracle.com/javase/1.4.2/docs/api/java/sql/Statement.html 请参阅javadoc: http : //docs.oracle.com/javase/1.4.2/docs/api/java/sql/Statement.html
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