SQL 查詢以檢索某個名字

Question

編寫一個 SQL 查詢來檢索貸款號，state 和城市，客戶名字，用於在 CA、TX、FL、NV、NM 州但不包括以下城市（達拉斯、舊金山、奧克蘭）的貸款，並且只返回貸款其中客戶的名字以 John 開頭。

我嘗試了什么：

SELECT [LoanNumber], [State], [City], [CustomerFname]
FROM dbo.Loan
WHERE STATE IN ('CA','TX','FL','NV','NM') 
AND CITY NOT IN ('DALLAS','SANFRANCISCO','OAKLAND')
HAVING [CustomerFname] = ' Mr.John'

Answer 1

僅在字符串末尾添加通配符條目 (%) 以獲取以 John 開頭的客戶。

SELECT [LoanNumber],[State],[City],[CustomerFname]
    FROM dbo.Loan
    WHERE STATE IN( 'CA','TX','FL','NV','NM') 
    AND CITY NOT IN('DALLAS','SANFRANCISCO','OAKLAND')
    AND [CustomerFname] LIKE 'Mr.John%'

Answer 2

SELECT [LoanNumber],[State],[City],[CustomerFname]
    FROM dbo.Loan
    WHERE STATE IN( 'CA','TX','FL','NV','NM') 
    AND CITY NOT IN('DALLAS','SANFRANCISCO','OAKLAND')
    AND [CustomerFname] LIKE '%Mr.John%'

Answer 3

SELECT [LoanNumber], [CustomerFname], [City], [State]
FROM [dbo].[Loan]
WHERE [State] IN ('CA','TX','FL','NV','NM') 
AND [City] NOT IN  ('Dallas', 'SanFrancisco', 'Oakland')
AND  [CustomerFname] LIKE '%John%'