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Functions
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cand()
Description:
Perform the logical AND operation over members of a sequence.
Syntax:
|
A.cand(x) |
|
|
cand(x1,…,xn) |
Equivalent to A.cand(), where x1,…,xn are members of sequence A |
Note:
The function performs a logical AND operation and returns true when expression x is true with all members of sequence A; otherwise, it returns false.
Operators in a logical operation is Boolean type; will automatically convert to Boolean type if they are not.
Parameter:
|
A |
A sequence |
|
x |
An expression; cannot be omitted when sequence A is a table sequence or a record sequence |
Return value:
Boolean
Example:
When A is a sequence:
|
|
A |
|
|
1 |
=[2<10,3>4,1!=1] |
Return members true, false, false |
|
2 |
=A1.cand() |
false |
|
3 |
=[1==1,1<2].cand() |
true |
|
4 |
=[20,1<2].cand() |
true; automatically convert to Boolean when an operator isn’t Boolean type |
|
5 |
=[null,1<2].cand() |
false |
|
6 |
=cand(null,1<2) |
False, which is same as A5 |
When A is a table sequence or a record sequence:
|
|
A |
|
|
1 |
=demo.query("select top 10 EID,NAME,GENDER,DEPT from EMPLOYEE") |
|
|
2 |
=A1.cand(DEPT) |
Judge whether DEPT values in table sequence A1 are true and return true |
|
3 |
=A1.cand(GENDER=="F") |
Judge whether DEPT values in table sequence A1 are “F” and return false |
