为什么80%的码农都做不了架构师?>>> JPA 2.1: Bulk Update and Delete In the JPA 2.0 and early version, if you want to execute a bulk updating query, you have to use update or delete clause in JPQL directly. JPA 2.1 introduce new Criteri…
什么是 Upsert "UPSERT" is a DBMS feature that allows a DML statements author to atomically either insert a row, or on the basis of the row already existing, UPDATE that existing row instead, while safely giving little to no further thought to con…
什么是 Upsert "UPSERT" is a DBMS feature that allows a DML statements author to atomically either insert a row, or on the basis of the row already existing, UPDATE that existing row instead, while safely giving little to no further thought to con…