从oracle导出表数据

Question

I need to create a flat file in java. In this flat file i write the insert statement where data comes from oracle table. Following is my java code

stmtSQL="SELECT * FROM Table1";
resultSQL=null;
resultSQL=myCreateStmt.executeQuery(stmtSQL);
strSQLIns="";
while(resultSQL.next())
{
strSQLIns=strSQLIns+"INSERT INTO Table1 VALUES ('";
for(int iLoopCtr=0;iLoopCtr<27;iLoopCtr++)
{
    if(iLoopCtr==26)
        strSQLIns=strSQLIns+resultSQL.getString(iLoopCtr+1)+"'";
    else
        strSQLIns=strSQLIns+resultSQL.getString(iLoopCtr+1)+"','";
}
strSQLIns=strSQLIns+");\n";
}

when I run this code system generates the insert statement like this

INSERT INTO Table1 VALUES ('80896948       ','gMWcjDMPXox4LVyrXGw0Ok+4SQI=');
INSERT INTO Table1 VALUES ('39454249       ','z+5fkcA+7wrZrF2455kngiTdYU4=');
INSERT INTO Table1 VALUES ('52167960       ','+N55nru+ewwhKPJygW99T8yEQXg=');

Now I do not want to use to while loop so code generate the above insert statement. I want some quick way so i generate such formatted sql query.

INSERT INTO Table1 (c1,c2) (SELECT '1', 'first row' FROM dual  UNION SELECT '2', 'second    row' FROM dual);

Answer 1

If you are in a production environment: the quickest way to do what you need is to use the import/export tools Oracle gives you

http://docs.oracle.com/cd/B10501_01/server.920/a96652/ch01.htm

If you have an academic problem or are doing this for the sake of it:

Your program is a nice point to start with. I would read the ResultSetMetadata , so you can drop that magic '26' from your code. Just store it all in a List<String[]> and then build your INSERT-SELECT command by iterating on that list. Beware that the example is over-simplified, and you will run with some problems:

• With some data types as dates and numbers, you will have to be extra-careful to format them as correct strings
• With some data types as BLOB, your idea is not likely to work