列级约束 meaning in English

column-level constraint
column-levelconstraint

Type , you can define column - level or table - level constraints
类型的列时，可以定义列级约束或表级约束。
Column level constraints
列级约束
Column - level constraint
列级约束
This includes all column - level and table - level constraints in create table , stored procedures , and triggers
这包括create table中所有列级约束和表级约束、存储过程以及触发器。