Learn what the SQL MERGE statement is, how it works, and how to use it to synchronize two tables by inserting, updating, and deleting data.

You can also combine SQL CASE and IF statements to create more complex and nested conditions in your queries. For example, suppose you have a table called products with columns id, name, price ...

A query containing multiple DML statements should gather the KV operations into a single batch request, regardless of whether RETURNING NOTHING is specified. For example, consider a query containing 3 ...

The CONNECT statement establishes a connection with the DBMS. You establish a connection to send DBMS-specific SQL statements to the DBMS or to retrieve DBMS data. The connection remains in effect ...

Statement每次执行sql语句,数据库都要执行sql语句的编译. 最好用于仅执行一次查询并返回结果的情形，效率高于PreparedStatement ...