– 查询数据库表中所有字段结构

SELECT	* FROM information_schema.COLUMNS WHERE table_schema = 'bladex' AND table_name = 'tb_capital_center';

– 查询数据库表种字段内容

SELECT
	Column_Name AS 列名英文,
	data_type AS 数据类型,
	(
	CASE
			
			WHEN data_type = 'float' 
			OR data_type = 'double' 
			OR data_type = 'TINYINT' 
			OR data_type = 'SMALLINT' 
			OR data_type = 'MEDIUMINT' 
			OR data_type = 'INT' 
			OR data_type = 'INTEGER' 
			OR data_type = 'decimal' 
			OR data_type = 'bigint' THEN
				NUMERIC_PRECISION #数字精度长度
				ELSE CHARACTER_MAXIMUM_LENGTH #字符串长度
			END 
			) AS '长度(整数)',
			NUMERIC_SCALE AS '长度(小数)',#小数位精度
			COLUMN_DEFAULT AS '默认值',
			COLUMN_COMMENT AS '列名中文' 
		FROM
			information_schema.COLUMNS 
		WHERE
			table_schema = 'bladex' #表所在数据库
-- tb_capital_center表名，到时候换成你要导出的表的名称
-- 如果不写的话，默认会查询出所有表中的数据，这样可能就分不清到底哪些字段是哪张表中的了，所以还是建议写上要导出的名名称
	AND table_name = 'tb_capital_center'