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add example code for count(1) in Functions.md (#412)

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* add doc for `count(1)`
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linrongbin16 2022-01-08 23:07:01 +08:00 committed by Roland Bock
parent 9b8463b1f6
commit eb48909721
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docs/Functions.md
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@ -35,6 +35,11 @@ for (const auto& row : db(select(tab.name, avg(tab.value))
} }
``` ```
Use `count(1)` for simply query row count:
```C++
const int64_t n = db(select(count(1)).from(tab).unconditionally()).front().count;
```
# Text Functions # Text Functions
## concat ## concat
Just use the + operator :-) Just use the + operator :-)