proc to export all the tables to storage. You will need to manually create the credential, file format and data source. There is a wild card for the schema and tables to export. There is a TOP variable you will need to change. Its currently set to 1, just in case someone executes this proc.

export_all_tables_to_storage.sql

/*
--https://docs.microsoft.com/en-us/sql/t-sql/statements/create-database-scoped-credential-transact-sql?view=sql-server-ver15
CREATE DATABASE SCOPED CREDENTIAL AppCred WITH IDENTITY = 'user',   SECRET = '<EnterStrongPasswordHere>';

--https://docs.microsoft.com/en-us/azure/synapse-analytics/sql/develop-tables-external-tables?tabs=hadoop#create-external-data-source
CREATE EXTERNAL FILE FORMAT [parquet_snappy] WITH (FORMAT_TYPE = PARQUET, DATA_COMPRESSION = N'org.apache.hadoop.io.compress.SnappyCodec')

CREATE EXTERNAL DATA SOURCE [ds_xxxxxxx] WITH (TYPE = HADOOP, LOCATION = N'wasbs://xxxxx@xxxx.blob.core.windows.net/',  CREDENTIAL = [AppCred])
*/

-- export_data   'dbo','%','parquet_snappy','ds_xxxxxxx'

Create proc export_data    
@input_schema_name varchar(50), @input_table_name varchar(500) ,@FILE_FORMAT varchar(2000) , @DATA_SOURCE  varchar(2000) 
as
begin

declare @del_table int =1; -- Set to 1 to generate a list of tables to export, set to 0 - to process an existing list
declare @clean_ext_table int =1; -- set to 1 to delete the external tables

DECLARE @sSQL varchar(8000);

---------------------------------------------------------------------------
--- JUST FOR TESTING.. just incase someone just executes everything
declare @top varchar(50)=  'top 1'; 
-------------------------------------------------------------------------

-- start and end time for performance
declare @start_datetime datetime2;
declare @end_datetime datetime2;

-- generating a random number
DECLARE @myid uniqueidentifier = newid()
declare @myid_s varchar(50);
set @myid_s =  convert(varchar(50),@myid)

declare @location varchar(500);


-- generating date and time
declare @dt datetime2;
declare @sdt varchar(50)
set @dt = getdate();
print @dt
set @sdt = convert(varchar(50), datepart(yyyy, @dt)  ) 
	+ '-' + convert(varchar(50), datepart(mm, @dt)  ) 
	+ '-'  + convert(varchar(50), datepart(dd, @dt)  ) 
	+ '--' + convert(varchar(50), datepart(hh, @dt)  ) 
	+ '-'  + convert(varchar(50), datepart(mi, @dt)  ) 
	+ '-'  + convert(varchar(50), datepart(ss, @dt)  ) 

if @del_table =1 
begin

	
	if exists (
	select 1 from sys.schemas s inner join sys.tables t 
	on s.schema_id = t.schema_id 
	where s.name =   'dbo' and t.name =  'tmp_tables' )
	BEGIN
		PRINT 'DELETE TABLE'
		set @sSQL = 'DROP TABLE [dbo].[tmp_tables];'
		EXEC (@sSQL);
	END
	ELSE
	BEGIN
		PRINT 'TABLE DOES NOT EXISTS'
	END

	-- create a perm table -we work through this table and log to it.
	create table dbo.tmp_tables 
	(
		seq_id bigint,
		[schema_name] varchar(255),
		[table_name]  varchar(255),
		[state]  varchar(255),
		[start_datetime] datetime2,
		[end_datetime] datetime2,
		[ext_table_name]  varchar(255),
		[label] varchar(500),
		[export_cmd] varchar(max),
		[data_source] varchar(500),
		[FILE_FORMAT] varchar(500),
		[Location] varchar(500)
	)
	with
	( distribution=round_robin, heap)

-- generating a list of tables to work on
insert into dbo.tmp_tables
select ROW_NUMBER() OVER(ORDER BY (SELECT NULL)) AS [seq_nmbr], s.name as [schema_name],
t.name as [table_name],'Ready for Export',null,null,null,null,null,null,null,null  from  sys.tables t 
inner join sys.schemas s on s.schema_id = t.schema_id
where t.is_external = 0
and t.name like  @input_table_name  and s.name =  @input_schema_name 
end

declare @sql2 varchar(8000);

DECLARE
	@i INT = 1
	, @t INT = (SELECT COUNT(*) FROM dbo.tmp_tables)
	,@schema_name varchar(255)
	,@table_name varchar(255)
	,@state varchar(255)
	
WHILE @i <= @t
  BEGIN

select @schema_name = [schema_name] , @table_name=[table_name],@state =[state]   from dbo.tmp_tables
where @i = seq_id

	declare @ext_table_name varchar(200) = 'ext_' +  @table_name + '_' + convert(varchar(50),@myid)

	set @start_datetime = getdate();

	if @state = 'Ready for Export' 
	begin

	begin try
	print 'Exporting'

		--set @location ='/exports/' + @sdt + '/' + @table_name + '/'
		set @location ='/exports/tables/' + @table_name + '/'

		set @sql2 = '
			CREATE EXTERNAL TABLE dbo.[' + @ext_table_name + '] 
			WITH (DATA_SOURCE = [' + @DATA_SOURCE + '], 
			LOCATION = N''' + @location + ''',
			FILE_FORMAT = [' + @FILE_FORMAT + '],
			REJECT_TYPE = VALUE,
			REJECT_VALUE = 99999)
			as  select ' + @top + ' * from [' + @schema_name + '].[' + @table_name + '] option (label=''' + @myid_s + ''')'

		print @sql2

		update  dbo.tmp_tables set state = 'Exporting', 
			start_datetime = @start_datetime, 
			ext_table_name = @ext_table_name  ,
			[label] = @myid_s,
			[export_cmd]  = @sql2 ,
			[data_source] = @DATA_SOURCE,
			[FILE_FORMAT] = @FILE_FORMAT,
			[Location] = @location
			where @i = seq_id

		exec (@sql2)

		set @state = 'Exported';
	
		if @clean_ext_table = 1 
		begin
			set @state = 'Deleting external table';
			declare @ssql3 varchar(8000);
			set @ssql3 = 'DROP EXTERNAL TABLE dbo.[' + @ext_table_name + ']' 
			exec(@ssql3)

			set @state = 'Done';
		end

	end try
	begin catch

		set @state = 'Error:' + ERROR_MESSAGE();
	end catch

	end

	set @end_datetime = getdate();
	update  dbo.tmp_tables set state = @state, end_datetime = @end_datetime where @i = seq_id

	SET @i+=1;
END
select * from dbo.tmp_tables ;


end