Update readme

Author: san127127

tools/sql/README.md

@@ -17,7 +17,8 @@ SQL_USER=$USERNAME SQL_PASSWORD=$PASSWD make install-schema-mysql
 - For other SQL database, you can add it easily as we do for MySQL/Postgres following our code in sql-extensions  
 
 ### Do one time database creation and schema setup for a new cluster
-- All command below are taking MySQL as example. For postgres, simply use with "--plugin postgres12"
+
+- All command below are taking MySQL as example. For postgres, simply use with "--plugin postgres12" and "--schema-name postgresql/v12/temporal" & "--schema-name postgresql/v12/visibility"
 
 ```
 ./temporal-sql-tool --ep $SQL_HOST -p $port --db temporal --plugin mysql8 create
@@ -26,10 +27,12 @@ SQL_USER=$USERNAME SQL_PASSWORD=$PASSWD make install-schema-mysql
 
 ```
 ./temporal-sql-tool --ep $SQL_HOST -p $port --plugin mysql8 --db temporal setup-schema -v 0.0 -- this sets up just the schema version tables with initial version of 0.0
-./temporal-sql-tool --ep $SQL_HOST -p $port --plugin mysql8 --db temporal update-schema -d ./schema/mysql/v8/temporal/versioned -- upgrades your schema to the latest version
+./temporal-sql-tool --ep $SQL_HOST -p $port --plugin mysql8 --db temporal update-schema --schema-name mysql/v8/temporal -- upgrades your schema with the embedded schema
+./temporal-sql-tool --ep $SQL_HOST -p $port --plugin mysql8 --db temporal update-schema -d ./schema/mysql/v8/temporal/versioned -- Or upgrades your schema by providing your schema
 
 ./temporal-sql-tool --ep $SQL_HOST -p $port --plugin mysql8 --db temporal_visibility setup-schema -v 0.0 -- this sets up just the schema version tables with initial version of 0.0 for visibility
-./temporal-sql-tool --ep $SQL_HOST -p $port --plugin mysql8 --db temporal_visibility update-schema -d ./schema/mysql/v8/visibility/versioned  -- upgrades your schema to the latest version for visibility
+./temporal-sql-tool --ep $SQL_HOST -p $port --plugin mysql8 --db temporal update-schema --schema-name mysql/v8/visibility -- upgrades your schema with the embedded schema for visibility
+./temporal-sql-tool --ep $SQL_HOST -p $port --plugin mysql8 --db temporal_visibility update-schema -d ./schema/mysql/v8/visibility/versioned  -- Or upgrades your schema by providing your schema for visibility
 ```
 
 ### Update schema as part of a release