Snowflake & Sigma SQL Expert

I need help tightening up the SQL that powers several Sigma dashboards connected to Snowflake. The top priority is writing and optimising queries whose main job is to enforce data consistency—catching mismatches, duplicate keys, or any other integrity issues before numbers hit the dashboards... (Budget: ₹400 - ₹750 INR, Jobs: Data Analysis, Data Visualization, Database Administration, Database Development, Database Management, MySQL, Snowflake, SQL)