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Add example for SubQuery

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Jinzhu 2017-10-18 18:41:08 +08:00
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documents/crud.md
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@ -198,6 +198,13 @@ db.Where("name <> ?","jinzhu").Where("age >= ? and role <> ?",20,"admin").Find(&
db.Where("role = ?", "admin").Or("role = ?", "super_admin").Not("name = ?", "jinzhu").Find(&users) db.Where("role = ?", "admin").Or("role = ?", "super_admin").Not("name = ?", "jinzhu").Find(&users)
``` ```
### SubQuery
```go
db.Where("amount > ?", DB.Table("orders").Select("AVG(amount)").Where("state = ?", "paid").QueryExpr()).Find(&orders)
// SELECT * FROM "orders" WHERE "orders"."deleted_at" IS NULL AND (amount > (SELECT AVG(amount) FROM "orders" WHERE (state = 'paid')));
```
### Extra Querying option ### Extra Querying option
```go ```go