= nil {//如果没有查询到任何数据就进入if中err:no rows in result set log.Println(select_err) return } log.Println(user) } 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 查多条: func main (){ //查询多条 select_rows,select_err := db.Query(sele...
= nil {//如果没有查询到任何数据就进入if中err:no rows in result setlog.Println(select_err)return} log.Println(user) } 查多条: func main (){//查询多条select_rows,select_err := db.Query(select_sql,16)ifselect_err !=nil { log.Println(select_err)return} defer select_rows.Close()for...
执行查询语句(使用rows.Scan) 执行增删改语句(使用db.Exec) 执行SQL文件(读取文件内容,执行每个分号分隔的SQL语句) 代码语言:javascript 复制 package lib import ( "database/sql" "errors" "fmt" "github.com/jinzhu/gorm" _ "github.com/jinzhu/gorm/dialects/mysql" "io/ioutil" "log" "os" "strings"...
age := 27rows, err := db.QueryContext(ctx, "SELECT name FROM users WHERE age=?", age)iferr !=nil { log.Fatal(err) } defer rows.Close() // 释放了连接 names := make([]string, 0)forrows.Next() { var name stringiferr := rows.Scan(&name); err !=nil {//Check for a scan...
mssql_test.go msdsn: set insecure skip verity in SetupTLS always Dec 16, 2021 net.go Workaround for Go 1.16 (#642) Apr 12, 2021 net_go116_test.go Context Logger (#691) Sep 24, 2021 newconnector_example_test.go Implement sqlexp Messages for Query/QueryContext (#690) ...
循环Rows的Error 如果循环中发生错误会自动运行rows.Close(),用rows.Err()接收这个错误,Close方法可以多次调用。循环之后判断error是非常必要的。 for rows.Next() { // ... } if err = rows.Err(); err != nil { // handle the error here } 关闭Resultsets时的error 如果你在rows遍历结束之前退出循...
No Database preselected: user:password@/ Connection pool and timeouts The connection pool is managed by Go's database/sql package. For details on how to configure the size of the pool and how long connections stay in the pool see*DB.SetMaxOpenConns,*DB.SetMaxIdleConns, and*DB.SetConnMax...
fifsky/gosql 代码Issues0Pull Requests0Wiki统计流水线 服务 加入Gitee 与超过 1200万 开发者一起发现、参与优秀开源项目,私有仓库也完全免费 :) 免费加入 已有帐号?立即登录 master 克隆/下载 git config --global user.name userName git config --global user.email userEmail ...
Go语言开发(十七)、Go语言database/sql接口 一、database/sql接口 Go语言官方没有提供数据库驱动,而是为开发数据库驱动定义了标准接口database/sql,开发者可以根据database/sql接口来开发相应的数据库驱动,只要是按照标准接口database/sql开发的代码,以后需要迁移数据库时,不需要任何修改。
Oh no! I made a mistake. Dolt supports undoing changes viacall dolt_reset(). Let's imagine I accidentally drop a table. mysql> drop table employees_teams; Query OK, 0 rows affected (0.01 sec) mysql> show tables; +---+ | Tables_in_getting_started | +---+ | employees | | ...