SQL Remove All Constraints Azure Friendly - sql

Question

I'm doing some DB Admin with an Azure database and I need to perform queries like removing all constraints in the database.
sp_MSForEachTable is not available when working with Azure databases, so I'm working on a different way to do it.
I found a snippet that drops all tables here: http://edspencer.me.uk/2013/02/25/drop-all-tables-in-a-sql-server-database-azure-friendly/ and tried modifying it to remove all constraints like I need to and came up with this result:
while(exists(select 1 from INFORMATION_SCHEMA.TABLES where TABLE_NAME != '__MigrationHistory'))
begin
PRINT ('Disabling' + TABLE_NAME)
declare #constraintOff nvarchar(2000)
SELECT TOP 1 #constraintOff=('ALTER TABLE ' + TABLE_SCHEMA + '.[' + TABLE_NAME + '] ' + 'NOCHECK CONSTRAINT all')
FROM INFORMATION_SCHEMA.TABLES
WHERE TABLE_NAME != '__MigrationHistory'
exec (#constraintOff)
PRINT #constraintOff
end
It repeatedly tries to operate on the first item in the database, which would work fine if you were dropping everything but I need to loop through each table and disable its constraint like sp_MSForEachTable does.
Any tips? I've seen a few things here and there that claim to do this, but they're usually two or three page long scripts that do a lot of other stuff and they make my brain hurt.
UPDATE
still working on that query, it seems like something to this end might work better but still no dice:
declare #constraintOff nvarchar(2000)
SELECT #constraintOff=('ALTER TABLE ' + TABLE_SCHEMA + '.[' + TABLE_NAME + '] ' + 'NOCHECK CONSTRAINT all')
FROM INFORMATION_SCHEMA.TABLES
exec (#constraintOff)
PRINT #constraintOff
This one still only operates on one table, but at least it's not an infinite loop :)

Answer 1

While this link is for Amazon RDS, it does provide specific code to disable constraints without sp_MSForEachTable
Importing and Exporting SQL Server Data
-- Manually specify database name - a safeguard in case you paste this into the wrong SSMS window.
USE [staging]
-- Change this line if you want to enable (1) or disable constraints:
DECLARE #enable_constraints bit = 0
--Don't change anything below this line.
DECLARE #schema_name SYSNAME
DECLARE #table_name SYSNAME
DECLARE table_cursor CURSOR FOR
SELECT
schemas.name,
tables.name
FROM
sys.tables
INNER JOIN sys.schemas ON tables.schema_id = schemas.schema_id
OPEN table_cursor
FETCH NEXT FROM table_cursor INTO #schema_name, #table_name
DECLARE #cmd varchar(200)
WHILE ##FETCH_STATUS = 0
BEGIN
SET #cmd = 'ALTER TABLE ' + QUOTENAME(#schema_name) + '.' + QUOTENAME(#table_name) + ' '
SET #cmd = #cmd + (CASE WHEN #enable_constraints = 1 THEN 'CHECK' ELSE 'NOCHECK' END) + ' CONSTRAINT ALL'
PRINT #cmd
EXEC( #cmd )
FETCH NEXT FROM table_cursor INTO #schema_name, #table_name
END
CLOSE table_cursor
DEALLOCATE table_cursor

Answer 2

Extended the script to deal with tables in different schemas, also corrected the above script that is not disabling checks:
-- DISABLE ALL CONSTRAINTS
DECLARE #table_name SYSNAME;
DECLARE #schema_name SYSNAME;
DECLARE #cmd NVARCHAR(MAX);
DECLARE table_cursor CURSOR FOR
SELECT s.name, t.name
FROM sys.tables t
join sys.schemas s on t.schema_id = s.schema_id
OPEN table_cursor;
FETCH NEXT FROM table_cursor INTO #schema_name, #table_name;
WHILE ##FETCH_STATUS = 0 BEGIN
SELECT #cmd = 'ALTER TABLE '+QUOTENAME(#schema_name)+'.'+QUOTENAME(#table_name)+' NOCHECK CONSTRAINT ALL';
EXEC (#cmd);
FETCH NEXT FROM table_cursor INTO #schema_name, #table_name;
END
CLOSE table_cursor;
DEALLOCATE table_cursor;
-- enable all constraints
DECLARE table_cursor CURSOR FOR
SELECT s.name, t.name
FROM sys.tables t
join sys.schemas s on t.schema_id = s.schema_id
OPEN table_cursor;
FETCH NEXT FROM table_cursor INTO #schema_name, #table_name;
WHILE ##FETCH_STATUS = 0 BEGIN
SELECT #cmd = 'ALTER TABLE '+QUOTENAME(#schema_name)+'.'+QUOTENAME(#table_name)+' CHECK CONSTRAINT ALL';
EXEC (#cmd);
FETCH NEXT FROM table_cursor INTO #schema_name, #table_name;
END
CLOSE table_cursor;
DEALLOCATE table_cursor;