2020-12-16 MySQL存在则更新不存在则新增方法

假设：dw.Bridge_cbs_crm的唯一Key定义为：student_id（主键、UNIQUE均可）

/*存在则更新*/

INSERT INTO dw.Bridge_cbs_crm (

student_id,

student_name,

serial,

`status`,

data_type,

lastSyncTime

) 

SELECT

student_id,

student_name,

serial,

`status`,

data_type,

@UpdateDate as lastSyncTime

FROM tmp_bridge_cbs_crm

WHERE data_type = 0

  ON DUPLICATE KEY

  UPDATE lastSyncTime=@UpdateDate;

/*存在则替换*/

REPLACE INTO dw.Bridge_cbs_crm (

student_id,

student_name,

serial,

`status`,

data_type,

lastSyncTime

) 

SELECT

student_id,

student_name,

serial,

`status`,

data_type,

@UpdateDate as lastSyncTime

FROM tmp_bridge_cbs_crm

WHERE data_type = 0;

/*插入新的差异数据,避免重复插入*/

INSERT IGNORE INTO dw.Bridge_cbs_crm (

student_id,

student_name,

serial,

`status`,

data_type,

lastSyncTime

)

SELECT

student_id,

student_name,

serial,

`status`,

data_type,

@UpdateDate as lastSyncTime

FROM tmp_bridge_cbs_crm

WHERE data_type = 0;