Some simple commands of Oracle and MySQL comparison reference
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Project | Oracle | MySQL
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Comparative version | 7.3.4.0.0 | 3.22.34
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Console Tools | SVRMGR.EXE | MySQLADMIN.EXE | SVRMGR23.EXE |
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Database Launcher | 0start73.exe Screen | MySQLD-ShaReware.exe
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Close the database command | Ostop73.exe | mysqladmin.exe -u root shutdown
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With user start-up mode |
C: /orawin95/bin/sqlplus.exe system / manager @ TNS |
C: /mysql/bin/mysql.exe test c: /mysql/bin/mysql.exe -u root test
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Default user (library) | SYS | MySQL
| System | Test
| Scott
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All tables | SQL> SELECT * from Tab; | MySQL> show tables;
| SQL> SELECT * from cat; | c: / mysql / bin> mysqlshow library name
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Current User (Library) | SQL> Show User | MySQL> Connect
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Display Table Structure | SQL> DESC Table Name | MySQL> DESC Table Download;
| SQL> Describe table name | mysql> Describe table name;
| | Mysql> show columns from table name; | | c: / mysql / bin> mysqlshow library name table name
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Date function | SQL> SELECT SYSDATE.
| | MySQL> Select now ();
| | MySQL> Select sysdate ();
| | MySQL> Select Curdate ();
| | MySQL> Select Current_Date;
| | MySQL> Select Curtime ();
| | MySQL> Select Current_time;
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Date format | SQL> Select to_char (sysdate, 'yyyy-mm-dd') from DUAL
| SQL> SELECT TO_CHAR (SYSDATE, 'HH24-MI-SS') from Dual;
| | Mysql> select Date_Format (now (), '% Y-% M-% D');
| | MySQL> SELECT TIME_FORMAT (now (), '% h-% I-% s');
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Period function (add one month)
| SQL> SELECT | TO_CHAR (add_months (to_date ('20000101'), 1), 'YYYY-MM-DD') from | Dual; Results: 2000-02-01
| | MySQL> SELECT DATE_ADD ('2000-01-01', Interval 1 Month);
| | | Result: 2000-02-01
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String intercept | Substr ('Abcdefg', 1, 5) | MID ('Abcdefg', 2, 3);
Substrb ('Abcdefg', 1, 5) | Substring ('Abcdefg', 2, 3);
| | Substring ('Abcdefg' from 2);
-------------------------------------------------- ------------------ External scripting command | SQL> @ a.sql | 1: mysql> Source A.sql
| | 2: C: / mysql / bin> mysql | | 3: C: / mysql / bin> MySQL library name -------------------------------------------------- ----------------- Import, export | exp.exe | mysqldump.exe | EXP73.EXE | MySQLIMPORT.EXE | imp.exe | | Imp73.exe | -------------------------------------------------- ---------------- Restriction record number | SQL> SELECT * FROM table name WHERE ROWNUM <5; | | MySQL> SELECT * FROM table name LIMIT 5; -------------------------------------------------- ----------------- Outer connection | Using ( ) | Using Left Join
