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John
2019-07-09 10:25:59 +08:00
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README.MD
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@ -212,7 +212,6 @@ db := g.DB("user-center")
```
### 2. Chaining Operations
#### 1). Basic
`Where + string`
```go
// SELECT * FROM user WHERE uid>1 LIMIT 0,10
@ -249,91 +248,8 @@ r, err := db.Table("user").Where(User{ Id : 1, UserName : "john"}).One()
// SELECT * FROM user WHERE uid =1
r, err := db.Table("user").Where(&User{ Id : 1}).One()
```
Complex one:
```go
conditions := g.Map{
"title like ?" : "%九寨%",
"online" : 1,
"hits between ? and ?" : g.Slice{1, 10},
"exp > 0" : nil,
"category" : g.Slice{100, 200},
}
result, err := db.Table("article").Where(conditions).All()
// SELECT * FROM article WHERE title like '%九寨%' AND online=1 AND hits between 1 and 10 AND exp > 0 AND category IN(100,200)
```
#### 2). `join`
```go
// SELECT u.*,ud.site FROM user u LEFT JOIN user_detail ud ON u.uid=ud.uid WHERE u.uid=1 LIMIT 1
r, err := db.Table("user u").LeftJoin("user_detail ud", "u.uid=ud.uid").Fields("u.*,ud.site").Where("u.uid=?", 1).One()
// SELECT ud.site FROM user u RIGHT JOIN user_detail ud ON u.uid=ud.uid WHERE u.uid=1 LIMIT 1
r, err := db.Table("user u").RightJoin("user_detail ud", "u.uid=ud.uid").Fields("ud.site").Where("u.uid=?", 1).Value()
// SELECT u.*,ud.site FROM user u INNER JOIN user_detail ud ON u.uid=ud.uid GROUP BY city ORDER BY register_time asc
r, err := db.Table("user u").InnerJoin("user_detail ud", "u.uid=ud.uid").Fields("u.*,ud.city").GroupBy("city").OrderBy("register_time asc").Select()
// SELECT u.*,ud.city FROM user u,user_detail ud WHERE u.uid=ud.uid
r, err := db.Table("user u,user_detail ud").Where("u.uid=ud.uid").Fields("u.*,ud.city").All()
```
#### 3). `select in`
```go
// SELECT * FROM user WHERE uid IN(100,10000,90000)
r, err := db.Table("user").Where("uid IN(?,?,?)", 100, 10000, 90000).All()
// SELECT * FROM user WHERE gender=1 AND uid IN(100,10000,90000)
r, err := db.Table("user").Where("gender=? AND uid IN(?)", 1, g.Slice{100, 10000, 90000}).All()
// SELECT COUNT(*) FROM user WHERE age in(18,50)
r, err := db.Table("user").Where("age IN(?,?)", 18, 50).Count()
```
With `map`:
```go
// SELECT * FROM user WHERE gender=1 AND uid IN(100,10000,90000)
r, err := db.Table("user").Where(g.Map{
"gender" : 1,
"uid" : g.Slice{100,10000,90000},
}).All()
```
With `struct`:
```go
type User struct {
Id []int `gconv:"uid"`
Gender int `gconv:"gender"`
}
// SELECT * FROM user WHERE uid IN(100,10000,90000) AND gender=1
r, err := db.Table("user").Where(User{
"gender" : 1,
"uid" : []int{100, 10000, 90000},
}).All()
```
#### 4). `like`
```go
// SELECT * FROM user WHERE name like '%john%'
r, err := db.Table("user").Where("name like ?", "%john%").Select()
// SELECT * FROM user WHERE birthday like '1990-%'
r, err := db.Table("user").Where("birthday like ?", "1990-%").Select()
```
#### 5). `sum`
```go
// SELECT SUM(score) FROM user WHERE uid=1
r, err := db.Table("user").Fields("SUM(score)").Where("uid=?", 1).Value()
```
#### 6). `count`
```go
// SELECT COUNT(1) FROM user WHERE `birthday`='1990-10-01'
r, err := db.Table("user").Where("birthday=?", "1990-10-01").Count()
// SELECT COUNT(uid) FROM user WHERE `birthday`='1990-10-01'
r, err := db.Table("user").Fields("uid").Where("birthday=?", "1990-10-01").Count()
```
#### 7). `distinct`
```go
// SELECT DISTINCT uid,name FROM user
r, err := db.Table("user").Fields("DISTINCT uid,name").Select()
```
### 3. Update & Delete
```go