**NEVER** use emoji, or unicode that emulates emoji (e.g. ✓, ✗).
Continue reading...。新收录的资料对此有专业解读
Our digitised version of the FT newspaper, for easy reading on any device.，这一点在新收录的资料中也有详细论述
journal_mode: The default rollback journal meant readers could block writers and vice-versa, so you effectively serialized all database access. This was a major bottleneck and most apps would see frequent SQLITE_BUSY errors start to stack up as a result. Instead, you can switch it to WAL mode which uses a write-ahead journal and allows readers and writers to access the DB concurrently.。关于这个话题，新收录的资料提供了深入分析