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)

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

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

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