92 lines
1.8 KiB
Go
92 lines
1.8 KiB
Go
package main
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import (
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"database/sql"
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_ "github.com/go-sql-driver/mysql"
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"log"
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)
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var database *sql.DB
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func initDataBase() (err error) {
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database, err = sql.Open("mysql", "root:123456@tcp(43.143.245.135:3306)/wangaodev")
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if err != nil {
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return err
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}
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err = database.Ping()
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if err != nil {
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return err
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}
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log.Println("Successfully connected to mysql")
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database.SetMaxOpenConns(10)
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database.SetMaxIdleConns(5)
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return nil
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}
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// 插入数据
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func insert(name, level string, status int) {
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//1.写sql语句
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sqlStr := `insert into user (name,level,status) values (?,?,?)`
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//2.exec
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ret, err := database.Exec(sqlStr, name, level, status)
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if err != nil {
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log.Println("insert error:", err)
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return
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}
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//如果是插入数据的操作，能够拿到插入数据的id
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id, err := ret.LastInsertId()
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if err != nil {
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log.Println("get id failed:", err)
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return
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}
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log.Println("id:", id)
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}
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// 更新数据
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func update(name string, id int) {
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//1.写sql语句
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sqlStr := `update user set name=? where id=?`
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//2.exec
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ret, err := database.Exec(sqlStr, name, id)
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if err != nil {
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log.Println("insert error:", err)
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return
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}
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//如果是插入数据的操作，能够拿到插入数据的id
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affectedNum, err := ret.RowsAffected()
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if err != nil {
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log.Println("update row failed:", err)
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return
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}
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log.Println("affectedNum:", affectedNum)
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}
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//删除数据
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func deleteRow(id int) {
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sqlStr := `delete from user where id=?`
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ret, err := database.Exec(sqlStr, id)
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if err != nil {
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log.Println("delete error:", err)
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}
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rowsAffected, err := ret.RowsAffected()
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if err != nil {
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log.Println("delete row failed:", err)
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}
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log.Println("rowsAffected:", rowsAffected)
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}
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func main() {
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err := initDataBase()
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if err != nil {
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log.Fatalf("connect mysql failed,error:%v", err)
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return
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}
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//insert("尹晨旭", "L2", 0)
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//update("吴斌", 19)
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deleteRow(19)
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}
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