I have follow this documnet https://devdocs.magento.com/guides/v2.3/extension-dev-guide/declarative-schema/db-schema.html but not get success
module.xml
<?xml version="1.0"?>
<!--
/**
* Copyright © Krish TechnoLabs, All rights reserved.
*/
-->
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:Module/etc/module.xsd">
<module name="Ktpl_Test1" setup_version="1.0.0">
<sequence>
<module name="Magento_Eav"/>
</sequence>
</module>
</config>
db_schema.xml
<?xml version="1.0"?>
<!--
/*
* Copyright © 2019 Krish Technolabs. All rights reserved.
* See COPYING.txt for license details
*/
-->
<schema xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:Setup/Declaration/Schema/etc/schema.xsd">
<table comment="Test Table 1" engine="innodb" name="ktpl_test1" resource="default">
<column identity="true" name="test1_id" nullable="false" padding="10" unsigned="true" xsi:type="int"/>
<column name="test_name" nullable="false" padding="10" unsigned="true" xsi:type="int"/>
<column name="test2_id" nullable="false" padding="10" unsigned="true" xsi:type="int"/>
<constraint referenceId="PRIMARY" xsi:type="primary">
<column name="test1_id"/>
</constraint>
<constraint xsi:type="foreign" referenceId="Test12ID" table="ktpl_test1" column="test2_id" referenceTable ="ktpl_test2" referenceColumn="test2_id"/>
<constraint xsi:type="foreign" referenceId="Test13ID" table="ktpl_test1" column="test3_id" referenceTable ="ktpl_test3" referenceColumn="test3_id"/>
</table>
<table name="eav_attribute" resource="default" engine="innodb" comment="Eav Attribute">
<column xsi:type="mediumtext" name="note" nullable="false" length="500" comment="Note"/>
<constraint xsi:type="primary" referenceId="PRIMARY">
<column name="attribute_id"/>
</constraint>
</table>
</schema>