php 拼接批量更新、插入SQL (已封装好,直接调用!)
分享一些自己封装的方法,直接调用
批量插入
功能:
1.返回批量插入sql语句
2.拼接时自动识别字符串或数字,判断是否加 ' '
3.可以选择 存在则插入,不存在则更新
/**
* 返回批量插入sql语句
* @param $table
* @param array $data 二维数组
* @param string $updateSql 更新内容,存在唯一索引值,则更新这条数据 eg: on duplicate key update time = unix_timestamp(now()) , type = 4
*/
function insertAllSql($table,$data,$updateSql='')
{
$start = "insert into {$table}";
// 字段
$field = '';
foreach ($data[0] as $k => $v){
$field .= "`$k`,";
}
$field = '('.rtrim($field,',').') values';
// 判断字段是否为字符串类型
$res = ComLib::select("SELECT COLUMN_NAME as 'field' ,DATA_TYPE as 'type' FROM information_schema.`COLUMNS` where TABLE_NAME = '{$table}' ");
foreach ($res as $v){
if ($v['type'] == 'varchar')
$fieldArr[$v['field']] = 1;
}
// 赋值
$after = '';
foreach ($data as $arr){
$tmp = '';
foreach ($arr as $k => $v){
if (isset($fieldArr[$k])){
$tmp .= "'{$v}',";
}else{
$tmp .= $v.',';
}
}
$after .= '('.rtrim($tmp,',').'),';
}
$after = rtrim($after,',').' ';
$sql = $start.$field.$after.$updateSql;
// var_dump($sql);
return $sql;
}
使用例子:
// 实现效果:
// 插入前两条数据;更新 id=3那条数据,更新 time = 当前时间 , 更新 status = 1
$data = [
['name' => 'aa','age'=>15],
['name' => 'bb','age'=>18],
['name' => 'cc','age' => 18,'id' => 3],
];
$updateSql = ' on duplicate key update `time` = unix_timestamp(now()) , `status` = 1 ';
$sql = insertAllSql('admin_user',$data,$updateSql);
Db::execute($sql);
批量更新
功能:
1.可指定唯一索引
2.可添加额外更新条件
/**
* 批量更新函数,返回批量更新执行的sql
* @param string $table 要更新的表名,例:goods表
* @param array $data 待更新的数据,二维数组格式,例:$data = [['id' => 1, 'name' => 'zhangsan'],['id' => 2, 'name' => 'lisi']];
* @param string $field string 值不同的条件,例:id
* @param array $params where条件的其他额外判断条件,键值对应的一维数组,例:['parent_id' => 1]
* @return bool|string
*/
function batchUpdate($table = '', $data = [], $field = '', $params = [])
{
if (!is_array($data) || !$field || !is_array($params)) {
return false;
}
$updates = parseUpdate($data, $field);
$where = parseParams($params);
// 获取所有键名为$field列的值,值两边加上单引号,保存在$fields数组中
$fields = array_column($data, $field);
$fields = implode(',', array_map(function($value) {
return "'".$value."'";
}, $fields));
$sql = sprintf("UPDATE `%s` SET %s WHERE `%s` IN (%s) %s", $table, $updates, $field, $fields, $where);
return $sql;
}
/**
* 将二维数组转换成CASE WHEN THEN的批量更新条件
* @param $data array 二维数组
* @param $field string 列名
* @return string sql语句
*/
function parseUpdate($data, $field)
{
$sql = '';
$keys = array_keys(current($data));
foreach ($keys as $column) {
if ($column == $field) {
continue;
}
$sql .= sprintf("`%s` = CASE `%s` \n", $column, $field);
foreach ($data as $line) {
$sql .= sprintf("WHEN '%s' THEN '%s' \n", $line[$field], $line[$column]);
}
$sql .= "END,";
}
return rtrim($sql, ',');
}
/**
* 解析where条件
* @param $params
* @return array|string
*/
function parseParams($params = [])
{
$where = [];
if (!empty($params)) {
foreach ($params as $key => $value) {
$where[] = sprintf("`%s` = '%s'", $key, $value);
}
}
return !empty($where) ? ' AND ' . implode(' AND ', $where) : '';
}
使用列子:
// 实现效果:
// 更新id=1、2、3且status = 1 的数据。
$data = [
['name' => 'aa','age'=>15,'id' => 1],
['name' => 'bb','age'=>18,'id' => 2],
['name' => 'cc','age' => 18,'id' => 3],
];
$sql = batchUpdate('admin_user',$data,'id',['status'=>1]);
Db::execute($sql);