介紹

• Employees Sample Database 是官方自帶的資料庫。裡面有幾百萬條資料。
• 所以我就借用該資料庫進行SQL語句的練習以及對資料庫的優化

表結構圖

安裝資料庫

1. git 下載地址。
2. 進入到專案
3. 輸入該命令，匯入employees.sql檔案mysql -u root -p < employees.sql
4. 驗證是否成功 mysql -u root -p < test_employees_md5.sql

INFO
TESTING INSTALLATION
table_name
 
  expected_records    expected_crc
employees   300024  4ec56ab5ba37218d187cf6ab09ce1aa1
departments 9   d1af5e170d2d1591d776d5638d71fc5f
dept_manager    24  8720e2f0853ac9096b689c14664f847e
dept_emp    331603  ccf6fe516f990bdaa49713fc478701b7
titles  443308  bfa016c472df68e70a03facafa1bc0a8
salaries    2844047 fd220654e95aea1b169624ffe3fca934
 

table_name  found_records       found_crc
employees   300024  4ec56ab5ba37218d187cf6ab09ce1aa1
departments 9   d1af5e170d2d1591d776d5638d71fc5f
dept_manager    24  8720e2f0853ac9096b689c14664f847e
dept_emp    331603  ccf6fe516f990bdaa49713fc478701b7
titles  443308  bfa016c472df68e70a03facafa1bc0a8
salaries    2844047
 
 fd220654e95aea1b169624ffe3fca934
table_name  records_match   crc_match
employees   OK  ok
departments OK  ok
dept_manager    OK  ok
dept_emp    OK  ok
titles  OK  ok
salaries    OK  ok
computation_time
00:00:13
summary result
CRC OK
count   OK

則匯入成功，可以開始玩了。