Linux, programming and more
Following line will query all mysql user with their grants and print the creation statements for them.
By copy pasting or by filling a SQL-file, you can easily migrate all MySQL-user to a new mysql or mariaDB instance.
mysql -u root -p"YOUR_PW" -Ne "select distinct concat( \"SHOW GRANTS FOR '\",user,\"'@'\",host,\"';\" ) from mysql.user;" mysql | \
mysql -u root -p"YOUR_PW"| \
sed 's/\(GRANT .*\)/\1;/;s/^\(Grants for .*\)/## \1 ##/;/##/{x;p;x;}'
Some basic postgre commands:
\d [NAME] describe table, index, sequence, or view \d{t|i|s|v|S} [PATTERN] (add "+" for more detail) list tables/indexes/sequences/views/system tables \da [PATTERN] list aggregate functions \db [PATTERN] list tablespaces (add "+" for more detail) \dc [PATTERN] list conversions \dC list casts \dd [PATTERN] show comment for object \dD [PATTERN] list domains \df [PATTERN] list functions (add "+" for more detail) \dg [PATTERN] list groups \dn [PATTERN] list schemas (add "+" for more detail) \do [NAME] list operators \dl list large objects, same as \lo_list \dp [PATTERN] list table, view, and sequence access privileges \dT [PATTERN] list data types (add "+" for more detail) \du [PATTERN] list users \l list all databases (add "+" for more detail)