mirror of https://gitee.com/bigwinds/arangodb
e22fa64bcf
Italic asterisks should be done by escaping the asterisk and wrapping it with html i-tag. It seems to be the only safe technique (3 asterisks to display 1 italic asterisk in a list works, unless followed by more markup for italic text; 1 escaped asterisk wrapped by i-tag works regardless of the rest of the line). |
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| .. | ||
| CollectionQueries.mdpp | ||
| DataModificationQueries.mdpp | ||
| Grouping.mdpp | ||
| Join.mdpp | ||
| ProjectionsAndFilters.mdpp | ||
| README.mdpp | ||
README.mdpp
!CHAPTER AQL Examples
This page contains some examples how to write queries in AQL. For better
understandability the query results are also included directly below each query.
!SECTION Simple queries
Following is a query that returns a string value. The result string is contained in a list
because the result of every valid query is a list:
```js
RETURN "this will be returned"
[
"this will be returned"
]
```
Here is a query that creates the cross products of two lists and runs a projection
on it, using a few of AQL's built-in functions:
```js
FOR year in [ 2011, 2012, 2013 ]
FOR quarter IN [ 1, 2, 3, 4 ]
RETURN {
"y" : "year",
"q" : quarter,
"nice" : CONCAT(TO_STRING(quarter), "/", TO_STRING(year))
}
[
{ "y" : "year", "q" : 1, "nice" : "1/2011" },
{ "y" : "year", "q" : 2, "nice" : "2/2011" },
{ "y" : "year", "q" : 3, "nice" : "3/2011" },
{ "y" : "year", "q" : 4, "nice" : "4/2011" },
{ "y" : "year", "q" : 1, "nice" : "1/2012" },
{ "y" : "year", "q" : 2, "nice" : "2/2012" },
{ "y" : "year", "q" : 3, "nice" : "3/2012" },
{ "y" : "year", "q" : 4, "nice" : "4/2012" },
{ "y" : "year", "q" : 1, "nice" : "1/2013" },
{ "y" : "year", "q" : 2, "nice" : "2/2013" },
{ "y" : "year", "q" : 3, "nice" : "3/2013" },
{ "y" : "year", "q" : 4, "nice" : "4/2013" }
]
```