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  1. 是否可以一次将多行插入 Postgres 数据库？有人可以建议是否有办法将切片插入数据库。我为每一行创建了一个切片，并通过将所有行切片附加到它来创建另一个切片（多行）。如何将切片（多行）插入数据库？

  2. 当我创建一个行切片时，我正在使用row := []interface{}{}. 因为我在每一行中都有字符串和 int 字段。看起来我在插入数据时出现错误，错误是unsupported type []interface {}, a slice of interface

执行：

rowdata := []interface{}{}
row := []interface{}{data.ScenarioUUID, data.Puid, data.Description, data.Status, data.CreatedBy, data.CreatedAt, data.UpdatedBy, data.UpdatedAt, data.ScopeStartsAt, data.ScopeEndsAt, Metric, MetricName, Channel, date, timeRangeValue}
rowdata = append(rowdata, row)

qry2 := `INSERT INTO sample (scenarioUuid,
            puId,
            description,
            status,
            createdBy,
            createdAt,
            updatedBy,
            updatedAt,
            scopeStartsAt,
            scopeEndsAt,
            metric,
            metric_name,
            channel,
            time,
            value) VALUES ($1, $2, $3,$4,$5,$6,$7,$8,$9,$10,$11,$12,$13,$14,$15)`

if _, err := db.Exec(qry2, rowdata); err != nil {
    panic(err)
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1 回答 1

13

你可以这样做：

samples := // the slice of samples you want to insert

query := `insert into samples (<the list of columns>) values `

values := []interface{}{}
for i, s := range samples {
    values = append(values, s.<field1>, s.<field2>, < ... >)

    numFields := 15 // the number of fields you are inserting
    n := i * numFields

    query += `(`
    for j := 0; j < numFields; j++ {
        query += `$`+strconv.Itoa(n+j+1) + `,`
    }
    query = query[:len(query)-1] + `),`
}
query = query[:len(query)-1] // remove the trailing comma

db.Exec(query, values...)

https://play.golang.org/p/YqNJKybpwWB

于 2018-07-02T08:51:40.873 回答