你即將離開本站

並前往https://www.red-gate.com/simple-talk/databases/sql-server/learn/sql-and-the-snare-of-three-valued-logic/

SQL and the Snare of Three-Valued Logic - Redgate Software

When you do a comparison with a NULL, you cannot get a Boolean (i.e. TRUE or FALSE) result. This is where we invented the logical value UNKNOWN.

確定！ 回上一頁

查詢 「SQL TRUE FALSE」的人也找了：

  1. MySQL true, false
    2.
  2. SQL select true false
    3.
  3. SQL Server TRUE/FALSE
    4.
  4. sql boolean欄位
    5.
  5. SQL boolean
    6.
  6. Mssql Boolean
    7.
  7. SQL SELECT boolean
    8.
  8. SQL Server bit
    9.