如何从表中检索多个记录？

Question

我有一个表有数据。

id type 
1 max 
1 sam 
1 rom 
2 jak 

我要检索的所有type其中id=1;

if(sqlite3_prepare_v2(database, sqlStatement, -1, &compiledStatement, NULL) == SQLITE_OK) { 
      while(sqlite3_step(compiledStatement) == SQLITE_ROW) { 
       NSString *aRecord = [NSString stringWithUTF8String:(char *)sqlite3_column_text(compiledStatement, 0)]; 
       NSLog (@"%@",aRecord); 
      } 

这一说法retrive我只有最后一条记录。我如何获得所有记录？

how to catch these records in the variable. I am using aRecord but it store only last record. So this is the main concern 

Answer 1

的SQL RO做到这一点很简单：

select * from <table_name> where id = 1 

做这样的事情：

NSMutableString *myRecords = [NSMutableString initWithString:@""]; 

if(sqlite3_prepare_v2(database, sqlStatement, -1, &compiledStatement, NULL) == SQLITE_OK) { 
      while(sqlite3_step(compiledStatement) == SQLITE_ROW) { 
       NSString *aRecord = [NSString stringWithUTF8String:(char *)sqlite3_column_text(compiledStatement, 0)];   

       myRecords = [myRecords stringByAppendingString:[NSString stringWithFormat:@"%@ ",arecord]];     
       NSLog (@"%@",aRecord); 
       } 

正如彼得Hosey在评论中指出，这会给你一个字符串所有三个记录都由空格分隔。您可能想要用这些记录填充数组。