sql 这个表的结构是什么意思?新手求解!
sql 这个表的结构是什么意思?有知道下面这些行的意思吗?新手求解!
TABLE_CATALOG
TABLE_SCHEMA
TABLE_NAME
COLUMN_NAME
ORDINAL_POSITION
COLUMN_DEFAULT
IS_NULLABLE
DATA_TYPE
CHARACTER_MAXIMUM_LENGTH
CHARACTER_OCTET_LENGTH
NUMERIC_PRECISION
NUMERIC_PRECISION_RADIX
NUMERIC_SCALE
DATETIME_PRECISION
CHARACTER_SET_CATALOG
CHARACTER_SET_SCHEMA
CHARACTER_SET_NAME
COLLATION_CATALOG
COLLATION_SCHEMA
COLLATION_NAME
DOMAIN_CATALOG
DOMAIN_SCHEMA
DOMAIN_NAME