any/all

The any and all operators are used with where or having.

$ where/having col optr any(sub_query)
$ where/having col optr all(sub_query)

where optr is a comparison operator, and sub_query is a SQL query or a vector.

The any and all keywords allow you to perform a comparison between an operand (i.e., a single column value) and a range of other values:

any: Returns true if any of the subqueries values meet the condition, otherwise false.
all: Returns true if all of the subqueries values meet the condition, otherwise false.

Note:

“=any” is equivalent to “in”, and “= all” is equivalent to “!= any”;
The SQL operator any/all is similar to DolphinDB’s built-in function any/all. See the difference from the following examples:

SQL any keyword:

$ x > any([n1,n2,n3])

any function:

$ any([x>n1, x>n2, x>n3])

Examples

$ sym = `C`MS`MS`MS`IBM`IBM`C`C`C$SYMBOL
$ price= 49.6 29.46 29.52 30.02 174.97 175.23 50.76 50.32 51.29
$ qty = 2200 1900 2100 3200 6800 5400 1300 2500 8800
$ timestamp = [09:34:07,09:36:42,09:36:51,09:36:59,09:32:47,09:35:26,09:34:16,09:34:26,09:38:12]
$ t1 = table(timestamp, sym, qty, price);
$ t2 = table(`C`MS`IBM as sym, 1 0 1 as flag)

$ select * from t1 where sym = any(select sym from t2 where flag=1)

timestamp	sym	qty	price
09:34:07	C	2,200	49.6
09:32:47	IBM	6,800	174.97
09:35:26	IBM	5,400	175.23
09:34:16	C	1,300	50.76
09:34:26	C	2,500	50.32
09:38:12	C	8,800	51.29

$ select * from t1 where sym != all(select sym from t2 where flag = 1)

timestamp	sym	qty	price
09:36:42	MS	1,900	29.46
09:36:51	MS	2,100	29.52
09:36:59	MS	3,200	30.02

$ t3 = select wavg(price, qty) as wavg from t1 group by sym
$ select * from t1 where price >= all(select wavg from t3)

timestamp	sym	qty	price
09:35:26	IBM	5,400	175.23

$ select * from t1 where price >= any(select wavg from t3)

timestamp	sym	qty	price
09:34:07	C	2,200	49.6
09:36:59	MS	3,200	30.02
09:32:47	IBM	6,800	174.97
09:35:26	IBM	5,400	175.23
09:34:16	C	1,300	50.76
09:34:26	C	2,500	50.32
09:38:12	C	8,800	51.29