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SELECT
TABLE_SCHEMA as '数据库名',
TABLE_NAME as '表名',
ORDINAL_POSITION as '序号',
COLUMN_NAME as '字段名',
COLUMN_TYPE as '数据类型',
IS_NULLABLE as '是否允许空值',
COLUMN_DEFAULT as '默认值',
COLUMN_KEY as '键',
EXTRA as '扩展',
COLUMN_COMMENT as '注释'
FROM information_schema.columns
where TABLE_SCHEMA = 'schema_name'
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