size_t lastcomma= insertsql.find_last_of(",");if(lastcomma !=string::npos) { insertsql= insertsql.substr(0, lastcomma); log_file_msg(get_time().append(".txt"),insertsql);boolinserted = stmt->execute(insertsql);
Now I need to INSERT these records in a table STUDENT. I was hesitant of looping through the number of records into the incoming XML and then creating connection and doing INSERT every time from Application. So, was thinking if there could be a way if that can be handled in Stored Pr...
CREATETABLEstudents(idINTAUTO_INCREMENTPRIMARYKEY,nameVARCHAR(100),ageINT,majorVARCHAR(100)); 1. 2. 3. 4. 5. 6. 现在,我们希望插入多条学生信息。我们可以使用以下INSERT语句: INSERTINTOstudents(name,age,major)VALUES('Alice',20,'Computer Science'),('Bob',22,'Mathematics'),('Charlie',21,'Ph...
drop table if exists t_vip; // 1个字段做主键,叫做:单一主键 create table t_vip( id int primary key, //列级约束 name varchar(255) ); insert into t_vip(id,name) values(1,'zhangsan'); insert into t_vip(id,name) values(2,'lisi'); //错误:不能重复 insert into t_vip(id,name) ...
在PHP和MySQL中,可以使用INSERT INTO -子查询返回多行来实现将子查询的结果插入到目标表中。具体的语法如下: 代码语言:txt 复制 INSERT INTO table_name (column1, column2, ...) SELECT column1, column2, ... FROM table_name2 WHERE condition; ...
ALTER TABLE students ADD COLUMN age INT, ADD COLUMN email VARCHAR(255); 这条语句会在students表中添加两列:age(整型)和email(最多255个字符的字符串型)。 在数据库管理工具或命令行中执行SQL语句: 你可以在MySQL的命令行客户端、图形化管理工具(如phpMyAdmin、MySQL Workbench等)中执行上述SQL语句。 验证列...
It is possible to useIGNOREwithON DUPLICATE KEY UPDATEin anINSERTstatement, but this may not behave as you expect when inserting multiple rows into a table that has multiple unique keys. This becomes apparent when an updated value is itself a duplicate key value. Consider the tablet, created ...
create table t_demo( id int NOT NULL AUTO_INCREMENT PRIMARY KEY, name varchar(10), score int ); insert into t_demo(name,score) values('a',10); insert into t_demo(name,score) values('b',20); insert into t_demo(name,score) values('c',30); ...
Insert Multiple Records To insert more than one record, make an array containing the values, and insert a question mark in the sql, which will be replaced by the value array: INSERT INTO customers (name, address) VALUES ? Example Fill the "customers" table with data: ...
I was trying to insert records into multiple tables in one file. The first two queries ran very well but the third one did not run. The first table is normal table while the last 2 tables are cross-reference tables, which store primary keys of two tables each. Here is the code ...