Archives: database


Postgresql cheatsheat No ratings yet.

Connecting to MySQL:  mysql -u user_name -p Connecting to PostgreSQL: sudo -u postgres psql Description MySQL command PostgreSQL equivalent Show databases SHOW DATABASES; \l[ist] Use/Connect to a database named ‘some_database’ USE some_database; \c some_database Show tables/relations within one database SHOW TABLES; \dt Show table details (columns, types) DESCRIBE some_table; \d+ some_table Show indices of some_table (in • Read More »


MySQL Binary field how to insert, search No ratings yet.

http://www.ovaistariq.net/632/understanding-mysql-binary-and-non-binary-string-data-types/ http://artarmstrong.com/blog/2014/12/07/store-uuid-as-binary16-mysql-data-type/ http://stackoverflow.com/questions/9081216/mysql-insert-statement-to-binary-datatype e.g: CREATE TABLE `Test` ( `myhash` binary(16) DEFAULT NULL ) Insert 10E8400E29B11D4A716446655440000 as HEX representation of some chars Insert into `Test` values ( UNHEX(“110E8400E29B11D4A716446655440000″) ); MySQL standard is to use this notation to denote the string as binary… X’9fad5e9eefdfb449′ insertinto assignedresource values(X’9fad5e9eefdfb449′); Search select hex(myhash) from Test where myhash=UNHEX(“110E8400E29B11D4A716446655440001″); Please rate this • Read More »