mysql纵向分别用视图合并数据

SELECT fields INTO OUTFILE 'file_name'

[{FIELDS | COLUMNS} 字段

[TERMINATED BY 'string'] 字段之间分隔符号

[[OPTIONALLY] ENCLOSED BY 'char'] 字段被包含在char中间

[ESCAPED BY 'char'] 忽略字段里出现的char

]

[LINES

[STARTING BY 'string'] 忽略开头是string的行

[TERMINATED BY 'string'] 行分隔符

]

FROM test_table

LOAD DATA [LOW_PRIORITY | CONCURRENT] [LOCAL] INFILE 'file_name'

[REPLACE | IGNORE] 遇到重复的时候处理方法，替换或者是忽略

INTO TABLE tbl_name 导入数据的目的表名

[PARTITION (partition_name,...)] 分区选择

[CHARACTER SET charset_name] 字符集

[{FIELDS | COLUMNS} 字段

[TERMINATED BY 'string'] 字段之间分隔符号

[[OPTIONALLY] ENCLOSED BY 'char'] 字段被包含在char中间

[ESCAPED BY 'char'] 忽略字段里出现的char

]

[LINES

[STARTING BY 'string'] 忽略开头是string的行

[TERMINATED BY 'string'] 行分隔符

]

[IGNORE number {LINES | ROWS}] 忽略行/列

[(col_name_or_user_var,...)] 目的表的表字段名或者用户变量名

[SET col_name = expr,...] 设置表字段值

select * from

(select * from A

union all

select * from B

union all

select * from C

union all

select * from D

union all

select * from E) tb

order by tb.datetime desc limit 5

---