INFORMATION_SCHEMA views are SQL-92 ANSI standards which conforms views with database metadata.
We can use SELECT statements to get their contents.
select * from Information_Schema.Check_Constraints
select * from Information_Schema.Column_Domain_Usage
select * from Information_Schema.Column_Privileges
select * from Information_Schema.Columns
select * from Information_Schema.Constraint_Column_Usage
select * from Information_Schema.Constraint_Table_Usage
select * from Information_Schema.Domain_Constraints
select * from Information_Schema.Domains
select * from Information_Schema.Key_Column_Usage
select * from Information_Schema.Parameters
select * from Information_Schema.Referential_Constraints
select * from Information_Schema.Routine_Columns
select * from Information_Schema.Routines
select * from Information_Schema.Schemata
select * from Information_Schema.Table_Constraints
select * from Information_Schema.Table_Privileges
select * from Information_Schema.Tables
select * from Information_Schema.Views
select * from Information_Schema.View_Column_Usage
select * from Information_Schema.View_Table_Usage
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