方法一通过information_schema.processlist表中的连接信息生成需要处理掉的MySQL连接的语句临时文件，然后执行临时文件中生成的指令。 mysql> select concat(‘KILL ‘,id,‘;‘) from information_schema.processlist where user=‘root‘; +------------------------+ | concat(‘KILL ‘,id,‘;‘) | +------------------------+ | KILL 3101; | | KILL 2946; | +------------------------+ 2 rows in ...
进行批量操作的时候，一定要事先判断数组非空<insert id="batchInsert"parameterType="java.util.List"> insert into DATA (ID, TEXT, STAUTS) <foreach close=")"collection="list"item="item"index="index"open="("separator="union"> select #{item.id,jdbcType=VARCHAR}, #{item.text,jdbcType=VARCHAR}, #{item.stauts,jdbcType=VARCHAR} from dual </foreach> </insert> AND r.license_plate IN<foreach collection...
mybatis foreach批量插入数据：Oracle与MySQL不同点：主要不同点在于foreach标签内separator属性的设置问题：separator设置为","分割时，最终拼接的代码形式为：insert into table_name (a,b,c) values (v1,v2,v3) ,(v4,v5,v6) ,... separator设置为"union all"分割时，最终拼接的代码形式为：insert into table_name (a,b,c) values (v1,v2,v3) union all (v4,v5,v6) union all...详情请见示例代码：Oracle: <insert id="inserDat...
java.io.File; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.IOException; import java.sql.Connection; import java.sql.DatabaseMetaData; import java.sql.DriverManager; import java.sql.PreparedStatement; import java.sql.ResultSet; import java.sql.ResultSetMetaData; import java.sql.SQLException; import java.sql.Statement; import java.util.ArrayList; import java.u...
table_name,concat(‘alter table `‘,table_name,‘` MODIFY ‘, column_name, ‘ ‘, data_type ,‘ auto_increment;‘) as ‘query script‘from information_schema.columns cwhere c.table_schema = ‘pv_2‘and c.column_key =‘PRI‘ and c.data_type in ( ‘int‘,‘bigint‘)and c.extra <> ‘auto_increment‘order by table_name; mysql 批量更新数据库主键为int，bigint 类型，字段为自增类型标签：sch lte post ...
左右的sql到user库 执行命令 mysql> use user Database changed mysql> source /tmp/user.sql 导入的过程中出现MySQL server has gone away错误，数据导入失败。 错误信息如下： ERROR 2006 (HY000): MySQL server has gone away ERROR 2006 (HY000): MySQL server has gone away No connection. Trying to reconnect... Connection id: 11 Current database: userERROR 2006 (HY000): MySQL server has gone away No connectio...
MySQL批量杀进程方法 一、通过SQL语句 mysql> desc information_schema.processlist;+---------+---------------------+------+-----+---------+-------+| Field | Type | Null | Key | Default | Extra |+---------+---------------------+------+-----+---------+-------+| ID | bigint(21) unsigned | NO | | 0 | || USER | varchar(32) | NO | | | ||...
<insert id="insertInfoBatch" parameterType="java.util.List" > insert into up_company_needs_ledger (needsid, nname, npapers, naddress, nretype, ncontacts, nphone, ndelstatus, naddstatus, ntime, npersion) values <foreach collection="needsList" item="item" index="index" separator=","> (#{item.needsid,jdbcType=INTEGER}, #{item.nname,jdbcType=VARCHAR}, #{item.npapers,jdbcType=VARCHAR}, #{item....
Mybatis中Dao层 public interface UsersMapper {public void insertEntitys(List<UserEntity> users); } Oracle中批量插入 <insert id="insertEntitys" parameterType="list" useGeneratedKeys="false">INSERT INTO tab_user(id,name)select cd.* from(<foreach collection="list" item="item" index="index" close=")" open="(" separator="union">select#{item.id,jdbcType=VARCHAR},#{item.name,jdbcType=VARCHAR}from dual</f...
= array( 1 => 4, 2 => 1, 3 => 2, 4 => 3, 5 => 9, 6 => 5, 7 => 8, 8 => 9 ); $ids = implode(‘,‘, array_keys($display_order)); $sql = "UPDATE categories SET display_order = CASE id "; foreach ($display_order as $id => $ordinal) { $sql .= sprintf("WHEN %d THEN %d ", $id, $ordinal); } $sql .= "END WHERE id IN ($ids)"; echo $sql;学习参考： https://blog.csdn.net/xiaoxiaodongxie/article/details/51...
项目中最近遇到了需要手动修改某个表的某个字段的数据，但是这个数据是来自别的表，需要关联，所以需要用到关联的批量更新，特此记录一下。 UPDATE t_account_trans_info AS iiINNER JOIN t_user AS uu ON ii.tran_user_id = uu.id SET ii.text2 = uu.link_man where ii.tran_user_id = uu.id mysql 表关联批量更新标签：批量更新 count inf user use mys 批量 ext2 ext 本文系统来源：https://www.cnblogs.co...
单库单表备份通用格式 mysqldump -uroot -p123456 test1 char_1>/opt/mysql_test1_char1.sql分析：这里test1是库名，char_1是表名 单库多表备份通用格式如果要一次性备份多个表，则语法如下演示如下： mysqldump -uroot -p123456 test1 char_1 char_2 char_3>/opt/mysql_test1_char1.sql分析：这就是把char_1,char_2,char_3 三个表都备份到该sql文件中去了。 疑问：表各有大小，如果我只是想还原某一个表，那如何做？ 回答：这...
利用Mybatis批量更新或者批量插入，实际上即使Mybatis完美支持你的sql，你也得看看你操作的数据库是否完全支持，而同事，最近就遇到这样的一个坑！ 问题 先带大家来看一段sql的配置：1 <update id="updateAllAvailable"> 2 <foreach collection="skuOptionList" item="item" index="index" open="" close="" separator=";"> update t_xxx 3 <set> old_id = #{item.oldId} </set> 4 where id = #{i...
方法一 ：case...when...then...endMySQL实现一条sql完成多条数据的更新方法二: ON DUPLICATE KEY UPDATE用法(需要利用主键索引或唯一索引冲突，来决定是插入还是更新)mysql实现upsert MySQL批量更新数据总结标签：date mysql 决定 cat strong 主键 ica dup 插入 本文系统来源：http://blog.51cto.com/phpme/2309019
= CASE id WHEN 1 THEN 3 WHEN 2 THEN 4 WHEN 3 THEN 5 END WHERE id IN (1,2,3);ID 是条件字段，WHEN 相当于where，THEN 表示要更新的字段设置成的值。 如果有多个字段要更新，模板如下UPDATE categories SET dingdan = CASE id WHEN 1 THEN 3 WHEN 2 THEN 4 WHEN 3 THEN 5 END, title = CASE id WHEN 1 THEN ‘New Title 1‘WHEN 2 THEN ‘New Title 2‘WHEN 3 THEN ‘New Title 3‘END WHERE id IN (1,2,3) 手动串接字符太麻烦...