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我是这个数据库编程的新手。我从数据库中检索单列数据,但我无法从数据库检索多列数据。如何从数据库中检索多列数据?
这里是我的代码
-(void) readItemsFromDatabaseforTable:(NSString *)tableName {
arrayItems = [[NSMutableArray alloc] init];
if(sqlite3_open([databasePath UTF8String], &database) == SQLITE_OK)
{
NSString *sql_str = [NSString stringWithFormat:@"select * from %@", tableName];
const char *sqlStatement = (char *)[sql_str UTF8String];
NSLog(@"query %s",sqlStatement);
sqlite3_stmt *compiledStatement;
if(sqlite3_prepare_v2(database, sqlStatement, -1, &compiledStatement, NULL) == SQLITE_OK)
{
while(sqlite3_step(compiledStatement) == SQLITE_ROW) {
NSString *idsstr = [NSString stringWithUTF8String:(char *)sqlite3_column_text(compiledStatement, 3)];
[arrayItems addObject:idsstr];
NSLog(@"*************** %@",arrayItems);
}
while(sqlite3_step(compiledStatement) == SQLITE_ROW)
{
NSString *caloriesstr = [NSString stringWithUTF8String:
(char*)sqlite3_column_text(compiledStatement, 4)];
[caloriesarry addObject:caloriesstr];
NSLog(@"naveenkumartesting");
NSLog(@"*************** %@",caloriesarry);
}
}
我的主要目的是从数据库中检索列的数据,并存储到多个阵列。
请你们谁能帮助我,
在我的程序中,我能够检索单列数据,但锄头检索多列数据。我尝试了上述方法但没有use.please给任何其他解决方案... – kumar 2012-04-23 05:08:09