``` mysql> select 'I''m a student'; +-----------------+ | 'I'm a student' | +-----------------+ | I'm a student | +-----------------+ mysql> select "I""m a student"; +-----------------+ | 'I"m a student' | +-----------------+ | I"m a student | +-----------------+ mysql> select 'I""m a student'; +------------------+ | 'I""m a student' | +------------------+ | I""m a student | +------------------+ mysql> select "I''m a student"; +------------------+ | 'I''m a student' | +------------------+ | I''m a student | +------------------+ ```
# fe-common This module is used to store some common classes of other modules. # spark-dpp This module is Spark DPP program, used for Spark Load function. Depends: fe-common # fe-core This module is the main process module of FE. Depends: fe-common, spark-dpp