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SELECT * FROM `KEY_COLUMN_USAGE`

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Filter rows:

CONSTRAINT_CATALOG	CONSTRAINT_SCHEMA	CONSTRAINT_NAME	TABLE_CATALOG	TABLE_SCHEMA	TABLE_NAME	COLUMN_NAME	ORDINAL_POSITION	POSITION_IN_UNIQUE_CONSTRAINT	REFERENCED_TABLE_SCHEMA	REFERENCED_TABLE_NAME	REFERENCED_COLUMN_NAME
def	sys	PRIMARY	def	sys	sys_config	variable	1	NULL	NULL	NULL	NULL
def	mysql	PRIMARY	def	mysql	proxies_priv	Host	1	NULL	NULL	NULL	NULL
def	mysql	PRIMARY	def	mysql	proxies_priv	User	2	NULL	NULL	NULL	NULL
def	mysql	PRIMARY	def	mysql	proxies_priv	Proxied_host	3	NULL	NULL	NULL	NULL
def	mysql	PRIMARY	def	mysql	proxies_priv	Proxied_user	4	NULL	NULL	NULL	NULL
def	mysql	PRIMARY	def	mysql	help_topic	help_topic_id	1	NULL	NULL	NULL	NULL
def	mysql	name	def	mysql	help_topic	name	1	NULL	NULL	NULL	NULL
def	mysql	PRIMARY	def	mysql	help_relation	help_keyword_id	1	NULL	NULL	NULL	NULL
def	mysql	PRIMARY	def	mysql	help_relation	help_topic_id	2	NULL	NULL	NULL	NULL
def	mysql	PRIMARY	def	mysql	table_stats	db_name	1	NULL	NULL	NULL	NULL
def	mysql	PRIMARY	def	mysql	table_stats	table_name	2	NULL	NULL	NULL	NULL
def	mysql	PRIMARY	def	mysql	innodb_table_stats	database_name	1	NULL	NULL	NULL	NULL
def	mysql	PRIMARY	def	mysql	innodb_table_stats	table_name	2	NULL	NULL	NULL	NULL
def	mysql	PRIMARY	def	mysql	columns_priv	Host	1	NULL	NULL	NULL	NULL
def	mysql	PRIMARY	def	mysql	columns_priv	Db	2	NULL	NULL	NULL	NULL
def	mysql	PRIMARY	def	mysql	columns_priv	User	3	NULL	NULL	NULL	NULL
def	mysql	PRIMARY	def	mysql	columns_priv	Table_name	4	NULL	NULL	NULL	NULL
def	mysql	PRIMARY	def	mysql	columns_priv	Column_name	5	NULL	NULL	NULL	NULL
def	mysql	PRIMARY	def	mysql	time_zone	Time_zone_id	1	NULL	NULL	NULL	NULL
def	mysql	PRIMARY	def	mysql	index_stats	db_name	1	NULL	NULL	NULL	NULL
def	mysql	PRIMARY	def	mysql	index_stats	table_name	2	NULL	NULL	NULL	NULL
def	mysql	PRIMARY	def	mysql	index_stats	index_name	3	NULL	NULL	NULL	NULL
def	mysql	PRIMARY	def	mysql	index_stats	prefix_arity	4	NULL	NULL	NULL	NULL
def	mysql	PRIMARY	def	mysql	servers	Server_name	1	NULL	NULL	NULL	NULL
def	mysql	PRIMARY	def	mysql	innodb_index_stats	database_name	1	NULL	NULL	NULL	NULL

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