问题
I googled a lot but..
How do I escape single quote in command line query of psql ?
psql -t -A -F $'\t' postgresql://zzzz:5432/casedb -U qqqq -c 'select id,ext_ids ->> 'qwe' as qwe from data ORDER BY qwe' > /jdata/qwe.tab
Results in error
ERROR: column "qwe" does not exist
LINE 1: select id,ext_ids ->> qwe as qwe from data...
回答1:
In Postgres you can use dollar-quoted strings:
select id,ext_ids ->> $$qwe$$ as qwe from data ORDER BY qwe;
-- or
select id,ext_ids ->> $anything$qwe$anything$ as qwe from data ORDER BY qwe;
回答2:
You could just use double quotes (") for the shell quoting and single quotes (') for the SQL quoting:
psql -t -A -F $'\t' postgresql://zzzz:5432/casedb -U qqqq -c "select id,ext_ids ->> 'qwe' as qwe from data ORDER BY qwe" > /jdata/qwe.tab
# Here ------------------------------------------------------^---------------------------------------------------------^
来源：https://stackoverflow.com/questions/38657883/how-do-i-escape-single-quote-in-command-line-query-of-psql