MySQL client out as CSV

If you need to convert MySQL Client output as CSV here is a recipe
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How to optimize aggregate queries in Clickhouse?

We will talk about a way which allow us to make keep aggregated data.
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How To Trace Your System Calls On Mac OS

dtruss is analog of strace in linux. It allows you to trace system calls from a running process or run a process with tracing. Also we are take a look on an alternative way.
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