select count(*) table; gives me a syntax error in 4.0 and 4.1 so I'm not
sure how that worked. Something similar would be select count(*) t;
which uses the shortcut alias syntax. It's the same as doing select
count(*) as t;
Simon Garner wrote:
[EMAIL PROTECTED] wrote:
I have a curious situation I was hoping someone could shed some light
on.
mysql> select count(*) table;
+-------+
| table |
+-------+
| 0 |
+-------+
1 row in set (0.00 sec)
mysql> select count(*) from table;
+----------+
| count(*) |
+----------+
| 25965 |
+----------+
1 row in set (0.00 sec)
I found it curious that the first query didn't return an error with
there being no 'from', and even more curious that it returned a 0.
Is the first query actually legit, and if so, what does the 0 mean?
Yes, you can do a select without a table. This allows you to get the
values of expressions or functions.
E.g.
SELECT 1+1
will return 2, and
SELECT NOW()
will return the current date and time.
Your query is selecting "COUNT(*) AS table" rather than "COUNT(*) FROM
table". Naturally, without a table, COUNT(*) will return 0.
-Simon
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