Function left() extracts a substring with specified length from the left of a string and return this substring.

Arguments：

• String <string>
• Length <number>

Returns：

• String <string>

Common Usage

Example: Direct calculate

uncollect ["graph", "database"] as a
uncollect [2, 3] as b
return left(a, b)

| left(a, b) |
|------------|
| gr         |
| dat        |

Exalmple: Multiply and calculate

uncollect ["graph", "database"] as a
uncollect [2, 3] as b
with left(a, b) as c
return c

|  c  |
|-----|
| gr  |
| gra |
| da  |
| dat |