Can't insert record in Sqlite Database - iphone

Question

I m using below code to for sqlite DB, but I can not insert values with Execute query can any one tell me where i m wrong ?
- (void)createEditableCopyOfDatabaseIfNeeded {
// First, test for existence.
BOOL success;
NSFileManager *fileManager = [NSFileManager defaultManager];
NSError *error;
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *writableDBPath = [documentsDirectory stringByAppendingPathComponent:DATABASE_NAME];
success = [fileManager fileExistsAtPath:writableDBPath];
if (success) return;
// The writable database does not exist, so copy the default to the appropriate location.
NSString *defaultDBPath = [[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent:DATABASE_NAME];
success = [fileManager copyItemAtPath:defaultDBPath toPath:writableDBPath error:&error];
if (!success) {
NSAssert1(0, #"Failed to create writable database file with message '%#'.", [error localizedDescription]);
}
}
Initialize Database
- (void)initializeDatabase {
// The database is stored in the application bundle.
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *path = [documentsDirectory stringByAppendingPathComponent:DATABASE_NAME];
// Open the database. The database was prepared outside the application.
if (sqlite3_open([path UTF8String], &database) == SQLITE_OK)
{
//TRUE
}
else
{
// Even though the open failed, call close to properly clean up resources.
sqlite3_close(database);
NSAssert1(0, #"Failed to open database with message '%s'.", sqlite3_errmsg(database));
// Additional error handling, as appropriate...
}
}
Execute Sql Method
-(void)ExecuteSQL:(NSString*)SQL
{
#synchronized(self)
{
sqlite3_stmt *select_statement=nil;
if (sqlite3_prepare_v2(database, [SQL UTF8String], -1, &select_statement, NULL) != SQLITE_OK) {
NSString *errString = [NSString stringWithFormat:#"%#",
[NSLocalizedString(#"statementPrepareFailedKey",#"")
stringByReplacingOccurrencesOfString:#"#" withString:[NSString
stringWithCString:sqlite3_errmsg(database) encoding:NSUTF8StringEncoding] ]];
NSAssert1(0, #"%#", errString);
}
//int columncount=sqlite3_column_count(select_statement);
//NSMutableDictionary* dic;
if(sqlite3_step(select_statement) == SQLITE_DONE)
{
NSLog(#"Execute sql");
}
sqlite3_finalize(select_statement);
}
}
Thanks.