Question

我正在尝试过滤出我公司的Excel客户表中的数据。我需要的三个字段是FIRST_NAME，LAST_NAME和COMPANY_NAME。

规则如下：

FIRST_NAME和LAST_NAME必须NOT为NULL
FIRST_NAME和LAST_NAME必须只是字母
如果COMPANY_NAME为NOT NULL

所以，重申要明确一点..客户必须有FIRST_NAME和LAST_NAME（他们不能错过一个或两个），但是，如果他们有{{1}他们被允许没有COMPANY_NAME和/或FIRST_NAME。

以下是一些示例数据，是否应保留数据：

LAST_NAME

以下是查询（删除了FIRST_NAME | LAST_NAME | COMPANY_NAME | Good customer? -----------|-----------|--------------|-------------------------------- Alex | Goodman | AG Inc. | Yes - All are filled out John | Awesome | | Yes - First and last are fine Cindy | | Cindy Corp. | Yes - Company is filled out | | Blank Spa | Yes - Company is filled out | | | No - Nothing is filled out Gordon | Mang#2 | | No - Last contains non-alphabet Jesse#5 | Levvitt | JL Inc. | Yes - Company is filled out Holly | | | No - No last or company names子句中的某些字段）：

SELECT

我也试过SELECT VR_CUSTOMERS.CUSTOMER_ID, VR_CUSTOMERS.FIRST_NAME, VR_CUSTOMERS.LAST_NAME, VR_CUSTOMERS.COMPANY_NAME, ... FROM DEV.VR_CUSTOMERS VR_CUSTOMERS WHERE ( LENGTH(NAME)>4 AND (UPPER(NAME) NOT LIKE UPPER('%delete%')) AND (COMPANY_NAME IS NOT NULL OR (COMPANY_NAME IS NULL AND FIRST_NAME IS NOT NULL AND LAST_NAME IS NOT NULL AND FIRST_NAME LIKE '%^[A-z]+$%' AND LAST_NAME LIKE '%^[A-z]+$%')) )的正则表达式。我尝试过'%[^a-z]%'和RLIKE，而不是REGEXP，这些似乎也没有用。

使用上述查询，结果仅显示带有LIKE的记录。

Answer 1

使用REGEXP_LIKE和正则表达式^[A-z]+$解决了问题。

以下是此修复后的WHERE子句：

WHERE (
LENGTH(NAME)>4 AND
(UPPER(NAME) NOT LIKE UPPER('%delete%')) AND
(COMPANY_NAME IS NOT NULL OR (COMPANY_NAME IS NULL AND REGEXP_LIKE(FIRST_NAME, '^[A-z]+$') AND REGEXP_LIKE(LAST_NAME, '^[A-z]+$')))
)

Answer 2

鉴于您提及RLIKE和REGEXP，您似乎正在使用MySQL。在这种情况下，请尝试使用regular expression character class 'alpha'：

的WHERE子句

WHERE 
      COMPANY_NAME is not null    -- COMPANY_NAME being present is the higher priority pass condition 
  or  ( -- but if COMPANY_NAME is not present, then the following conditions must be satisfied 
           FIRST_NAME is not null 
       and FIRST_NAME REGEXP '[[:alpha:]]+' 
       and LAST_NAME is not null 
       and LAST_NAME REGEXP '[[:alpha:]]+' 
      )

请记住，给定正则表达式，非空检查是多余的，因此WHERE子句将自身简化为：

WHERE 
      COMPANY_NAME is not null    -- COMPANY_NAME being present is the higher priority pass condition 
  or  ( -- but if COMPANY_NAME is not present, then the following conditions must be satisfied 
           FIRST_NAME REGEXP '[[:alpha:]]+' 
       and LAST_NAME REGEXP '[[:alpha:]]+' 
      )

查询WHERE仅字母字符

2 个答案: