use INFORMATION_SCHEMA; show tables; Tables_in_information_schema ALL_PLUGINS APPLICABLE_ROLES CHARACTER_SETS CHECK_CONSTRAINTS CLIENT_STATISTICS COLLATIONS COLLATION_CHARACTER_SET_APPLICABILITY COLUMNS COLUMN_PRIVILEGES ENABLED_ROLES ENGINES EVENTS FILES GEOMETRY_COLUMNS GLOBAL_STATUS GLOBAL_VARIABLES INDEX_STATISTICS INNODB_BUFFER_PAGE INNODB_BUFFER_PAGE_LRU INNODB_BUFFER_POOL_STATS INNODB_CMP INNODB_CMPMEM INNODB_CMPMEM_RESET INNODB_CMP_PER_INDEX INNODB_CMP_RESET INNODB_LOCKS INNODB_LOCK_WAITS INNODB_METRICS INNODB_MUTEXES INNODB_SYS_COLUMNS INNODB_SYS_FIELDS INNODB_SYS_FOREIGN INNODB_SYS_FOREIGN_COLS INNODB_SYS_INDEXES INNODB_SYS_TABLES INNODB_SYS_TABLESTATS INNODB_SYS_VIRTUAL INNODB_TABLESPACES_ENCRYPTION INNODB_TRX KEYWORDS KEY_CACHES KEY_COLUMN_USAGE OPTIMIZER_TRACE PARAMETERS PARTITIONS PLUGINS PROCESSLIST PROFILING REFERENTIAL_CONSTRAINTS ROUTINES SCHEMATA SCHEMA_PRIVILEGES SESSION_STATUS SESSION_VARIABLES SPATIAL_REF_SYS SQL_FUNCTIONS STATISTICS SYSTEM_VARIABLES TABLES TABLESPACES TABLE_CONSTRAINTS TABLE_PRIVILEGES TABLE_STATISTICS TRIGGERS USER_PRIVILEGES USER_STATISTICS VIEWS SELECT t.table_name, c1.column_name FROM information_schema.tables t INNER JOIN information_schema.columns c1 ON t.table_schema = c1.table_schema AND t.table_name = c1.table_name WHERE t.table_schema = 'information_schema' AND c1.ordinal_position = ( SELECT COALESCE(MIN(c2.ordinal_position),1) FROM information_schema.columns c2 WHERE c2.table_schema = t.table_schema AND c2.table_name = t.table_name AND c2.column_name LIKE '%SCHEMA%' ) order by t.table_name; table_name column_name ALL_PLUGINS PLUGIN_NAME APPLICABLE_ROLES GRANTEE CHARACTER_SETS CHARACTER_SET_NAME CHECK_CONSTRAINTS CONSTRAINT_SCHEMA CLIENT_STATISTICS CLIENT COLLATIONS COLLATION_NAME COLLATION_CHARACTER_SET_APPLICABILITY COLLATION_NAME COLUMNS TABLE_SCHEMA COLUMN_PRIVILEGES TABLE_SCHEMA ENABLED_ROLES ROLE_NAME ENGINES ENGINE EVENTS EVENT_SCHEMA FILES TABLE_SCHEMA GEOMETRY_COLUMNS F_TABLE_SCHEMA GLOBAL_STATUS VARIABLE_NAME GLOBAL_VARIABLES VARIABLE_NAME INDEX_STATISTICS TABLE_SCHEMA INNODB_BUFFER_PAGE POOL_ID INNODB_BUFFER_PAGE_LRU POOL_ID INNODB_BUFFER_POOL_STATS POOL_ID INNODB_CMP page_size INNODB_CMPMEM page_size INNODB_CMPMEM_RESET page_size INNODB_CMP_PER_INDEX database_name INNODB_CMP_RESET page_size INNODB_LOCKS lock_id INNODB_LOCK_WAITS requesting_trx_id INNODB_METRICS NAME INNODB_MUTEXES NAME INNODB_SYS_COLUMNS TABLE_ID INNODB_SYS_FIELDS INDEX_ID INNODB_SYS_FOREIGN ID INNODB_SYS_FOREIGN_COLS ID INNODB_SYS_INDEXES INDEX_ID INNODB_SYS_TABLES TABLE_ID INNODB_SYS_TABLESTATS TABLE_ID INNODB_SYS_VIRTUAL TABLE_ID INNODB_TABLESPACES_ENCRYPTION SPACE INNODB_TRX trx_id KEYWORDS WORD KEY_CACHES KEY_CACHE_NAME KEY_COLUMN_USAGE CONSTRAINT_SCHEMA OPTIMIZER_TRACE QUERY PARAMETERS SPECIFIC_SCHEMA PARTITIONS TABLE_SCHEMA PLUGINS PLUGIN_NAME PROCESSLIST ID PROFILING QUERY_ID REFERENTIAL_CONSTRAINTS CONSTRAINT_SCHEMA ROUTINES ROUTINE_SCHEMA SCHEMATA SCHEMA_NAME SCHEMA_PRIVILEGES TABLE_SCHEMA SESSION_STATUS VARIABLE_NAME SESSION_VARIABLES VARIABLE_NAME SPATIAL_REF_SYS SRID SQL_FUNCTIONS FUNCTION STATISTICS TABLE_SCHEMA SYSTEM_VARIABLES VARIABLE_NAME TABLES TABLE_SCHEMA TABLESPACES TABLESPACE_NAME TABLE_CONSTRAINTS CONSTRAINT_SCHEMA TABLE_PRIVILEGES TABLE_SCHEMA TABLE_STATISTICS TABLE_SCHEMA TRIGGERS TRIGGER_SCHEMA USER_PRIVILEGES GRANTEE USER_STATISTICS USER VIEWS TABLE_SCHEMA SELECT t.table_name, c1.column_name FROM information_schema.tables t INNER JOIN information_schema.columns c1 ON t.table_schema = c1.table_schema AND t.table_name = c1.table_name WHERE t.table_schema = 'information_schema' AND c1.ordinal_position = ( SELECT COALESCE(MIN(c2.ordinal_position),1) FROM information_schema.columns c2 WHERE c2.table_schema = 'information_schema' AND c2.table_name = t.table_name AND c2.column_name LIKE '%SCHEMA%' ) order by t.table_name; table_name column_name ALL_PLUGINS PLUGIN_NAME APPLICABLE_ROLES GRANTEE CHARACTER_SETS CHARACTER_SET_NAME CHECK_CONSTRAINTS CONSTRAINT_SCHEMA CLIENT_STATISTICS CLIENT COLLATIONS COLLATION_NAME COLLATION_CHARACTER_SET_APPLICABILITY COLLATION_NAME COLUMNS TABLE_SCHEMA COLUMN_PRIVILEGES TABLE_SCHEMA ENABLED_ROLES ROLE_NAME ENGINES ENGINE EVENTS EVENT_SCHEMA FILES TABLE_SCHEMA GEOMETRY_COLUMNS F_TABLE_SCHEMA GLOBAL_STATUS VARIABLE_NAME GLOBAL_VARIABLES VARIABLE_NAME INDEX_STATISTICS TABLE_SCHEMA INNODB_BUFFER_PAGE POOL_ID INNODB_BUFFER_PAGE_LRU POOL_ID INNODB_BUFFER_POOL_STATS POOL_ID INNODB_CMP page_size INNODB_CMPMEM page_size INNODB_CMPMEM_RESET page_size INNODB_CMP_PER_INDEX database_name INNODB_CMP_RESET page_size INNODB_LOCKS lock_id INNODB_LOCK_WAITS requesting_trx_id INNODB_METRICS NAME INNODB_MUTEXES NAME INNODB_SYS_COLUMNS TABLE_ID INNODB_SYS_FIELDS INDEX_ID INNODB_SYS_FOREIGN ID INNODB_SYS_FOREIGN_COLS ID INNODB_SYS_INDEXES INDEX_ID INNODB_SYS_TABLES TABLE_ID INNODB_SYS_TABLESTATS TABLE_ID INNODB_SYS_VIRTUAL TABLE_ID INNODB_TABLESPACES_ENCRYPTION SPACE INNODB_TRX trx_id KEYWORDS WORD KEY_CACHES KEY_CACHE_NAME KEY_COLUMN_USAGE CONSTRAINT_SCHEMA OPTIMIZER_TRACE QUERY PARAMETERS SPECIFIC_SCHEMA PARTITIONS TABLE_SCHEMA PLUGINS PLUGIN_NAME PROCESSLIST ID PROFILING QUERY_ID REFERENTIAL_CONSTRAINTS CONSTRAINT_SCHEMA ROUTINES ROUTINE_SCHEMA SCHEMATA SCHEMA_NAME SCHEMA_PRIVILEGES TABLE_SCHEMA SESSION_STATUS VARIABLE_NAME SESSION_VARIABLES VARIABLE_NAME SPATIAL_REF_SYS SRID SQL_FUNCTIONS FUNCTION STATISTICS TABLE_SCHEMA SYSTEM_VARIABLES VARIABLE_NAME TABLES TABLE_SCHEMA TABLESPACES TABLESPACE_NAME TABLE_CONSTRAINTS CONSTRAINT_SCHEMA TABLE_PRIVILEGES TABLE_SCHEMA TABLE_STATISTICS TABLE_SCHEMA TRIGGERS TRIGGER_SCHEMA USER_PRIVILEGES GRANTEE USER_STATISTICS USER VIEWS TABLE_SCHEMA select 1 as "must be 1" from information_schema.tables where "ACCOUNTS"= (select cast(table_name as char) from information_schema.tables order by table_name limit 1) limit 1; must be 1 1 select t.table_name, group_concat(t.table_schema, '.', t.table_name), count(*) as num1 from information_schema.tables t inner join information_schema.columns c1 on t.table_schema = c1.table_schema AND t.table_name = c1.table_name where t.table_schema = 'information_schema' and c1.ordinal_position = (select isnull(c2.column_type) - isnull(group_concat(c2.table_schema, '.', c2.table_name)) + count(*) as num from information_schema.columns c2 where c2.table_schema='information_schema' and (c2.column_type = 'varchar(7)' or c2.column_type = 'varchar(20)') group by c2.column_type order by num limit 1) group by t.table_name order by num1, t.table_name; table_name group_concat(t.table_schema, '.', t.table_name) num1 ALL_PLUGINS information_schema.ALL_PLUGINS 1 APPLICABLE_ROLES information_schema.APPLICABLE_ROLES 1 CHARACTER_SETS information_schema.CHARACTER_SETS 1 CHECK_CONSTRAINTS information_schema.CHECK_CONSTRAINTS 1 CLIENT_STATISTICS information_schema.CLIENT_STATISTICS 1 COLLATIONS information_schema.COLLATIONS 1 COLLATION_CHARACTER_SET_APPLICABILITY information_schema.COLLATION_CHARACTER_SET_APPLICABILITY 1 COLUMNS information_schema.COLUMNS 1 COLUMN_PRIVILEGES information_schema.COLUMN_PRIVILEGES 1 ENGINES information_schema.ENGINES 1 EVENTS information_schema.EVENTS 1 FILES information_schema.FILES 1 GEOMETRY_COLUMNS information_schema.GEOMETRY_COLUMNS 1 GLOBAL_STATUS information_schema.GLOBAL_STATUS 1 GLOBAL_VARIABLES information_schema.GLOBAL_VARIABLES 1 INDEX_STATISTICS information_schema.INDEX_STATISTICS 1 INNODB_BUFFER_PAGE information_schema.INNODB_BUFFER_PAGE 1 INNODB_BUFFER_PAGE_LRU information_schema.INNODB_BUFFER_PAGE_LRU 1 INNODB_BUFFER_POOL_STATS information_schema.INNODB_BUFFER_POOL_STATS 1 INNODB_CMP information_schema.INNODB_CMP 1 INNODB_CMPMEM information_schema.INNODB_CMPMEM 1 INNODB_CMPMEM_RESET information_schema.INNODB_CMPMEM_RESET 1 INNODB_CMP_PER_INDEX information_schema.INNODB_CMP_PER_INDEX 1 INNODB_CMP_RESET information_schema.INNODB_CMP_RESET 1 INNODB_LOCKS information_schema.INNODB_LOCKS 1 INNODB_LOCK_WAITS information_schema.INNODB_LOCK_WAITS 1 INNODB_METRICS information_schema.INNODB_METRICS 1 INNODB_MUTEXES information_schema.INNODB_MUTEXES 1 INNODB_SYS_COLUMNS information_schema.INNODB_SYS_COLUMNS 1 INNODB_SYS_FIELDS information_schema.INNODB_SYS_FIELDS 1 INNODB_SYS_FOREIGN information_schema.INNODB_SYS_FOREIGN 1 INNODB_SYS_FOREIGN_COLS information_schema.INNODB_SYS_FOREIGN_COLS 1 INNODB_SYS_INDEXES information_schema.INNODB_SYS_INDEXES 1 INNODB_SYS_TABLES information_schema.INNODB_SYS_TABLES 1 INNODB_SYS_TABLESTATS information_schema.INNODB_SYS_TABLESTATS 1 INNODB_SYS_VIRTUAL information_schema.INNODB_SYS_VIRTUAL 1 INNODB_TABLESPACES_ENCRYPTION information_schema.INNODB_TABLESPACES_ENCRYPTION 1 INNODB_TRX information_schema.INNODB_TRX 1 KEY_CACHES information_schema.KEY_CACHES 1 KEY_COLUMN_USAGE information_schema.KEY_COLUMN_USAGE 1 OPTIMIZER_TRACE information_schema.OPTIMIZER_TRACE 1 PARAMETERS information_schema.PARAMETERS 1 PARTITIONS information_schema.PARTITIONS 1 PLUGINS information_schema.PLUGINS 1 PROCESSLIST information_schema.PROCESSLIST 1 PROFILING information_schema.PROFILING 1 REFERENTIAL_CONSTRAINTS information_schema.REFERENTIAL_CONSTRAINTS 1 ROUTINES information_schema.ROUTINES 1 SCHEMATA information_schema.SCHEMATA 1 SCHEMA_PRIVILEGES information_schema.SCHEMA_PRIVILEGES 1 SESSION_STATUS information_schema.SESSION_STATUS 1 SESSION_VARIABLES information_schema.SESSION_VARIABLES 1 SPATIAL_REF_SYS information_schema.SPATIAL_REF_SYS 1 STATISTICS information_schema.STATISTICS 1 SYSTEM_VARIABLES information_schema.SYSTEM_VARIABLES 1 TABLES information_schema.TABLES 1 TABLESPACES information_schema.TABLESPACES 1 TABLE_CONSTRAINTS information_schema.TABLE_CONSTRAINTS 1 TABLE_PRIVILEGES information_schema.TABLE_PRIVILEGES 1 TABLE_STATISTICS information_schema.TABLE_STATISTICS 1 TRIGGERS information_schema.TRIGGERS 1 USER_PRIVILEGES information_schema.USER_PRIVILEGES 1 USER_STATISTICS information_schema.USER_STATISTICS 1 VIEWS information_schema.VIEWS 1 +---------------------------------------+ +---------------------------------------+ +---------------------------------------+ Database: information_schema | Tables | | ALL_PLUGINS | | APPLICABLE_ROLES | | CHARACTER_SETS | | CHECK_CONSTRAINTS | | CLIENT_STATISTICS | | COLLATIONS | | COLLATION_CHARACTER_SET_APPLICABILITY | | COLUMNS | | COLUMN_PRIVILEGES | | ENABLED_ROLES | | ENGINES | | EVENTS | | FILES | | GEOMETRY_COLUMNS | | GLOBAL_STATUS | | GLOBAL_VARIABLES | | INDEX_STATISTICS | | INNODB_BUFFER_PAGE | | INNODB_BUFFER_PAGE_LRU | | INNODB_BUFFER_POOL_STATS | | INNODB_CMP | | INNODB_CMPMEM | | INNODB_CMPMEM_RESET | | INNODB_CMP_PER_INDEX | | INNODB_CMP_RESET | | INNODB_LOCKS | | INNODB_LOCK_WAITS | | INNODB_METRICS | | INNODB_MUTEXES | | INNODB_SYS_COLUMNS | | INNODB_SYS_FIELDS | | INNODB_SYS_FOREIGN | | INNODB_SYS_FOREIGN_COLS | | INNODB_SYS_INDEXES | | INNODB_SYS_TABLES | | INNODB_SYS_TABLESTATS | | INNODB_SYS_VIRTUAL | | INNODB_TABLESPACES_ENCRYPTION | | INNODB_TRX | | KEYWORDS | | KEY_CACHES | | KEY_COLUMN_USAGE | | OPTIMIZER_TRACE | | PARAMETERS | | PARTITIONS | | PLUGINS | | PROCESSLIST | | PROFILING | | REFERENTIAL_CONSTRAINTS | | ROUTINES | | SCHEMATA | | SCHEMA_PRIVILEGES | | SESSION_STATUS | | SESSION_VARIABLES | | SPATIAL_REF_SYS | | SQL_FUNCTIONS | | STATISTICS | | SYSTEM_VARIABLES | | TABLES | | TABLESPACES | | TABLE_CONSTRAINTS | | TABLE_PRIVILEGES | | TABLE_STATISTICS | | TRIGGERS | | USER_PRIVILEGES | | USER_STATISTICS | | VIEWS | +---------------------------------------+ +---------------------------------------+ +---------------------------------------+ Database: INFORMATION_SCHEMA | Tables | | ALL_PLUGINS | | APPLICABLE_ROLES | | CHARACTER_SETS | | CHECK_CONSTRAINTS | | CLIENT_STATISTICS | | COLLATIONS | | COLLATION_CHARACTER_SET_APPLICABILITY | | COLUMNS | | COLUMN_PRIVILEGES | | ENABLED_ROLES | | ENGINES | | EVENTS | | FILES | | GEOMETRY_COLUMNS | | GLOBAL_STATUS | | GLOBAL_VARIABLES | | INDEX_STATISTICS | | INNODB_BUFFER_PAGE | | INNODB_BUFFER_PAGE_LRU | | INNODB_BUFFER_POOL_STATS | | INNODB_CMP | | INNODB_CMPMEM | | INNODB_CMPMEM_RESET | | INNODB_CMP_PER_INDEX | | INNODB_CMP_RESET | | INNODB_LOCKS | | INNODB_LOCK_WAITS | | INNODB_METRICS | | INNODB_MUTEXES | | INNODB_SYS_COLUMNS | | INNODB_SYS_FIELDS | | INNODB_SYS_FOREIGN | | INNODB_SYS_FOREIGN_COLS | | INNODB_SYS_INDEXES | | INNODB_SYS_TABLES | | INNODB_SYS_TABLESTATS | | INNODB_SYS_VIRTUAL | | INNODB_TABLESPACES_ENCRYPTION | | INNODB_TRX | | KEYWORDS | | KEY_CACHES | | KEY_COLUMN_USAGE | | OPTIMIZER_TRACE | | PARAMETERS | | PARTITIONS | | PLUGINS | | PROCESSLIST | | PROFILING | | REFERENTIAL_CONSTRAINTS | | ROUTINES | | SCHEMATA | | SCHEMA_PRIVILEGES | | SESSION_STATUS | | SESSION_VARIABLES | | SPATIAL_REF_SYS | | SQL_FUNCTIONS | | STATISTICS | | SYSTEM_VARIABLES | | TABLES | | TABLESPACES | | TABLE_CONSTRAINTS | | TABLE_PRIVILEGES | | TABLE_STATISTICS | | TRIGGERS | | USER_PRIVILEGES | | USER_STATISTICS | | VIEWS | +--------------------+ +--------------------+ +--------------------+ Wildcard: inf_rmation_schema | Databases | | information_schema | SELECT table_schema, count(*) FROM information_schema.TABLES WHERE table_schema IN ('mysql', 'INFORMATION_SCHEMA', 'test', 'mysqltest') GROUP BY TABLE_SCHEMA; table_schema count(*) information_schema 67 mysql 31