Question: i try to evaluate this sentence:

```
<font color="0.839216,0.839216,0.839216" strokeColor="none" size="35" face="Avenir-Book">

```

i need to extract the 3 float values of the color attribute 

with this code:

```
NSRegularExpression* colorRegex = [[[NSRegularExpression alloc] initWithPattern:@"color=([0-9]+),([0-9]+),([0-9]+)" options:0 error:NULL] autorelease];

[colorRegex enumerateMatchesInString:tag options:0 range:NSMakeRange(0, [tag length]) usingBlock:^(NSTextCheckingResult *match, NSMatchingFlags flags, BOOL *stop){

NSNumber *redComponent=[NSNumber numberWithFloat: [[tag substringWithRange: match.range] floatValue] ];
NSNumber *greenComponent=[NSNumber numberWithFloat: [[tag substringWithRange: match.range ] floatValue] ];
NSNumber *blueComponent=[NSNumber numberWithFloat: [[tag substringWithRange: match.range] floatValue] ];

self.color=[[UIColor alloc] initWithRed:redComponent.floatValue green:greenComponent.floatValue blue:blueComponent.floatValue alpha:1];

NSLog(@"color %@,%@,%@",redComponent,greenComponent,blueComponent);

```

i tested several regular expressions but I did not succeed, could somebody help me ?

Answer: 
```
SELECT a.id
FROM tableA a
WHERE a.id NOT IN (
    SELECT b.id
    FROM tableB b
    WHERE b.tno = 2
)

```

[SQLFIddle Demo](http://www.sqlfiddle.com/#!3/1ae9e/1)
```
SELECT id FROM tableA WHERE id NOT IN (SELECT id FROM tableB WHERE tno=2)

```