查询MySQL数据库表的结构和数据

1. 查询表结构（字段名称和注释）

sql 复制代码

-- 查询表的字段信息（包括字段名、数据类型、注释等）
SELECT 
    COLUMN_NAME AS '字段名称',
    COLUMN_TYPE AS '数据类型',
    IS_NULLABLE AS '是否为空',
    COLUMN_DEFAULT AS '默认值',
    COLUMN_COMMENT AS '字段注释'
FROM INFORMATION_SCHEMA.COLUMNS 
WHERE TABLE_SCHEMA = 'smart_procurement_db' 
    AND TABLE_NAME = 'product_photovoltaic_module_second_param'
ORDER BY ORDINAL_POSITION;

2. 查询表的所有数据

sql 复制代码

-- 查询表中的所有数据
SELECT * FROM smart_procurement_db.product_photovoltaic_module_second_param;

3. 更详细的字段信息

sql 复制代码

-- 详细字段信息，包括索引、键信息
SHOW FULL COLUMNS FROM product_photovoltaic_module_second_param FROM smart_procurement_db;

4. 查看表的基本信息

sql 复制代码

-- 查看表的基本信息
SHOW TABLE STATUS FROM smart_procurement_db LIKE 'product_photovoltaic_module_second_param';

5. 查看结构和部分数据

sql 复制代码

-- 首先查看结构
DESC smart_procurement_db.product_photovoltaic_module_second_param;

-- 然后查看前几行数据作为示例
SELECT * FROM smart_procurement_db.product_photovoltaic_module_second_param LIMIT 5;

排除不要的字段：

dart 复制代码

SELECT 
    COLUMN_NAME AS '字段名称',
    COLUMN_TYPE AS '数据类型',
    IS_NULLABLE AS '是否为空',
    COLUMN_DEFAULT AS '默认值',
    COLUMN_COMMENT AS '字段注释'
FROM INFORMATION_SCHEMA.COLUMNS 
WHERE TABLE_SCHEMA = 'smart_procurement_db' 
    AND TABLE_NAME = 'product_photovoltaic_module_second_param'
    AND LOWER(COLUMN_NAME) NOT LIKE '%id%'  -- 排除所有包含"id"的字段
ORDER BY ORDINAL_POSITION;

dart 复制代码

SELECT 
    COLUMN_NAME AS '字段名称',
    COLUMN_TYPE AS '数据类型',
    IS_NULLABLE AS '是否为空',
    COLUMN_DEFAULT AS '默认值',
    COLUMN_COMMENT AS '字段注释'
FROM INFORMATION_SCHEMA.COLUMNS 
WHERE TABLE_SCHEMA = 'smart_procurement_db' 
    AND TABLE_NAME = 'product_photovoltaic_module_second_param'
    AND COLUMN_NAME NOT IN ('id', 'ID', 'Id')  -- 排除可能的ID字段变体
ORDER BY ORDINAL_POSITION;