作者:快乐的老爷们土豆_534 | 来源:互联网 | 2023-05-23 10:15
mysql判断字段是否存在的方法-1.desc命令格式:desctablenamecolumnname例子:desc`table``mid`desc`table`%abc%2.sh
1. desc 命令
格式: desc tablename columnname
例子:
desc `table` `mid`
desc `table` '%abc%'
2. show columns 命令
格式: show columns from tablename like columnname
例子:
show columns from `table` like 'mid'
show columns from `table` like '%abc%'
3. describe 命令
格式: describe tablename columnname
describe 相?于 show columns from
例子:
describe `table` `mid`
describe `table` '%abc%'