diff --git a/htdocs/install/check.php b/htdocs/install/check.php
index 55331634aff..6075ad14702 100644
--- a/htdocs/install/check.php
+++ b/htdocs/install/check.php
@@ -451,7 +451,8 @@ else
 								array('from'=>'6.0.0', 'to'=>'7.0.0'),
 								array('from'=>'7.0.0', 'to'=>'8.0.0'),
 								array('from'=>'8.0.0', 'to'=>'9.0.0'),
-								array('from'=>'9.0.0', 'to'=>'10.0.0')
+								array('from'=>'9.0.0', 'to'=>'10.0.0'),
+								array('from'=>'10.0.0', 'to'=>'11.0.0')
 		);
 
 		$count=0;
diff --git a/htdocs/install/mysql/migration/10.0.0-11.0.0.sql b/htdocs/install/mysql/migration/10.0.0-11.0.0.sql
index 9f758b6bc40..520007e453c 100644
--- a/htdocs/install/mysql/migration/10.0.0-11.0.0.sql
+++ b/htdocs/install/mysql/migration/10.0.0-11.0.0.sql
@@ -2,6 +2,30 @@
 -- Be carefull to requests order.
 -- This file must be loaded by calling /install/index.php page
 -- when current version is 11.0.0 or higher.
+--
+-- To restrict request to Mysql version x.y minimum use -- VMYSQLx.y
+-- To restrict request to Pgsql version x.y minimum use -- VPGSQLx.y
+-- To rename a table:       ALTER TABLE llx_table RENAME TO llx_table_new;
+-- To add a column:         ALTER TABLE llx_table ADD COLUMN newcol varchar(60) NOT NULL DEFAULT '0' AFTER existingcol;
+-- To rename a column:      ALTER TABLE llx_table CHANGE COLUMN oldname newname varchar(60);
+-- To drop a column:        ALTER TABLE llx_table DROP COLUMN oldname;
+-- To change type of field: ALTER TABLE llx_table MODIFY COLUMN name varchar(60);
+-- To drop a foreign key:   ALTER TABLE llx_table DROP FOREIGN KEY fk_name;
+-- To create a unique index ALTER TABLE llx_table ADD UNIQUE INDEX uk_table_field (field);
+-- To drop an index:        -- VMYSQL4.1 DROP INDEX nomindex on llx_table
+-- To drop an index:        -- VPGSQL8.2 DROP INDEX nomindex
+-- To make pk to be auto increment (mysql):    -- VMYSQL4.3 ALTER TABLE llx_table CHANGE COLUMN rowid rowid INTEGER NOT NULL AUTO_INCREMENT;
+-- To make pk to be auto increment (postgres):
+-- -- VPGSQL8.2 CREATE SEQUENCE llx_table_rowid_seq OWNED BY llx_table.rowid;
+-- -- VPGSQL8.2 ALTER TABLE llx_table ADD PRIMARY KEY (rowid);
+-- -- VPGSQL8.2 ALTER TABLE llx_table ALTER COLUMN rowid SET DEFAULT nextval('llx_table_rowid_seq');
+-- -- VPGSQL8.2 SELECT setval('llx_table_rowid_seq', MAX(rowid)) FROM llx_table;
+-- To set a field as NULL:                     -- VMYSQL4.3 ALTER TABLE llx_table MODIFY COLUMN name varchar(60) NULL;
+-- To set a field as NULL:                     -- VPGSQL8.2 ALTER TABLE llx_table ALTER COLUMN name DROP NOT NULL;
+-- To set a field as NOT NULL:                 -- VMYSQL4.3 ALTER TABLE llx_table MODIFY COLUMN name varchar(60) NOT NULL;
+-- To set a field as NOT NULL:                 -- VPGSQL8.2 ALTER TABLE llx_table ALTER COLUMN name SET NOT NULL;
+-- To set a field as default NULL:             -- VPGSQL8.2 ALTER TABLE llx_table ALTER COLUMN name SET DEFAULT NULL;
+-- Note: fields with type BLOB/TEXT can't have default value.
 
 
 create table llx_entrepot_extrafields
@@ -12,4 +36,9 @@ create table llx_entrepot_extrafields
   import_key                varchar(14)                          		-- import key
 ) ENGINE=innodb;
 
-ALTER TABLE llx_entrepot_extrafields ADD INDEX idx_entrepot_extrafields (fk_object);
\ No newline at end of file
+ALTER TABLE llx_entrepot_extrafields ADD INDEX idx_entrepot_extrafields (fk_object);
+
+
+ALTER TABLE llx_c_shipment_mode ADD COLUMN entity integer DEFAULT 1;
+ALTER TABLE llx_c_shipment_mode DROP INDEX uk_c_shipment_mode;
+ALTER TABLE llx_c_shipment_mode ADD UNIQUE INDEX uk_c_shipment_mode (code, entity);