把那 5000 多万条企业数据放到 SQLite 数据库里

至于是哪 5000 多万条，自己去找吧。

需要先安装 PSSQLite 模块，具体可以参考用 PowerShell 玩转 SQLite 数据库

Import-Module PSSQLite
$ent_codes_db = "D:\Scripts\DB\ent_codes.sqlite"
$query = "INSERT INTO ent_codes VALUES (@name, @code, @regday, @character, @legalr, @capital, @bscope, @prov, @city, @addr)"
Get-ChildItem D:\Downloads\json\ -Recurse -File | % {
    (Get-Content $_.fullname | ConvertFrom-Json).erDataList | % {
        $name       = $_.name
        $code       = $_.code
        $regday     = $_.registrationDay
        $character  = $_.character
        $legalr     = $_.legalRepresentative
        $capital    = $_.capital
        $bscope     = $_.businessScope
        $prov       = $_.province
        $city       = $_.city
        $addr       = $_.address
        Invoke-SqliteQuery -DataSource $ent_codes_db -Query $query -SqlParameters @{
            name      = $name
            code      = $code
            regday    = $regday
            character = $character
            legalr    = $legalr
            capital   = $capital
            bscope    = $bscope
            prov      = $prov
            city      = $city
            addr      = $addr
        }
    }
}