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This returns the wrong number looks like it returns the total number of items found in table_b not the total from table_a that meet the requirements.

MadScientist
– MadScientist

2012-04-20 20:04:30 +00:00
Commented Apr 20, 2012 at 20:04
1

I think this would be correct if you changed COUNT(a.id) to COUNT(DISTINCT a.id)

ypercubeᵀᴹ
– ypercubeᵀᴹ

2012-04-20 20:27:30 +00:00
Commented Apr 20, 2012 at 20:27

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create code fences with backticks ` or tildes ~
```
like so
```
add language identifier to highlight code
```python
def function(foo):
print(foo)
```
put returns between paragraphs
for linebreak add 2 spaces at end
_italic_ or **bold**
indent code by 4 spaces
backtick escapes `like _so_`
quote by placing > at start of line
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