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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