| Bug #17865 | SELECT DISTINCT x quicker that SELECT COUNT (DISTINCT x) | ||
|---|---|---|---|
| Submitted: | 2 Mar 2006 15:25 | Modified: | 24 Jan 2014 9:42 |
| Reporter: | Stephen Harris | Email Updates: | |
| Status: | Closed | Impact on me: | |
| Category: | MySQL Server: Optimizer | Severity: | S5 (Performance) |
| Version: | 5.0.18 | OS: | Any (Fedore Core 5 RC3) |
| Assigned to: | CPU Architecture: | Any | |
If the data you need to attach is more than 50MB, you should create a compressed archive of the data, split it to 50MB chunks, and upload each of them as a separate attachment.
To split a large file:
- On *nix platforms use the split command e.g.
split -b 50MB <my_large_archive> <my_split_archive_prefix> - On windows use WinZip or a similar utility to split the large file
