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SET @COLUMNNAMES_HIST= ( SELECT STRING_AGG( COLUMN_NAME, ' ,') COLUMN_NAMES FROM INFORMATION_SCHEMA.COLUMNS WHERE UPPER(TABLE_SCHEMA) = '@SCHEMANAME' AND UPPER(TABLE_NAME) = '@TABLE_HIST';                

SET @MERGESQL = 'MERGE ' +  @TABLE_HIST + ' USING #FINAL_TEMP_CPY SRC
ON (TGT.@PRIMARYKEY = SRC.@PRIMARYKEY AND TGT.UPDATE_TIMESTAMP = SRC.UPDATE_TIMESTAMP)
WHEN NOT MATCHED BY TARGET
            THEN INSERT
            (
                @COLUMNNAMES_HIST -- Column list
            ) 
        
            (
                SELECT *, GETTIMESTAMP(),  GETTIMESTAMP() FROM FINAL_TEMP_CPY;
            )'

我首先将 TABLE_HIST 中的所有列提取到一个变量中，并且我在 INSERT 语句中使用了该变量。这样好吗？然后在值中，我从源表中获取所有值并同时获取 TABLE_HIST 中其他两列的时间戳。你认为这会奏效吗？

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