Question

我有两张桌子X和Y

SELECT ser.entity_type,ser.param_name
FROM X as ser
where
ser.group_name like '%CRVJL%'
and ser.param_name like '%CBV%'
and ser.entity_type like '%SIGNON%'


SELECT reg.entity_type
FROM   REGISTER_TB as reg
where
reg.group_name like '%CRVJL%' and reg.PROV_NAME like'%CBV%' and  reg.PROV_NAME like'%-OD-%' and reg.ENTITY_TYPE like '%SIGNON%'

我从表格x中得到一些值，比如4行，我必须检查它们是否存在于y中，如果不存在则为-1，如果存在则为+1

  Table should look like this
   entity type  param_name      status
   SIGNON        CBV6815_I-OD-I     1
   SIGNON        CBV7815_I-OD-I     1
   SIGNON        CBV8815_I-OD-I    -1
   SIGNON        CBV9815_I-OD-I     1   

      we have equal columns
      X                 Y
    entity_type       entity_type  
    param-value        prov_name

我尝试使用左连接联合和右连接，但它没有给我输出，因为我想。可以有人帮助我吗？

Answer 1

使用此类查询，您必须替换表/字段名称以匹配您的架构

SELECT a.entity_type, a.param_name, IF(b.status IS NULL, -1, 1) AS 'status'
FROM
    X AS a
    LEFT OUTER JOIN Y AS b ON a.entity_type=b.entity_type AND a.group_name=b.group_name
WHERE
    a.group_name LIKE '%CRVJL%'
    AND a.param_name LIKE '%CBV%'
    AND a.entity_type LIKE '%SIGNON%'
    AND b.prov_name LIKE '%CBV-OD-%'

加入两个查询以获取特定的表格式

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