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List of contents of this article:

• 1, oracle how to create users and grant permissions
• 2, ora Cle How to set the user to log in without a password
• 3、 What are the usernames/passwords brought by the default installation of Oracle11g?
• 4, oracle user lock problem
• 5, How Oracle creates table space and users
6, What is a user in oracle?

oracLe How to create a user and give permissions

1. Open oracle third-party tools, such as plsq, and then log in with a user with dba permissions. Then open an SQL window. Execution statement: create user username identified by password; where the username needs to be in English, and the password needs to be numbers or letters or English symbols or combinations.

2. Create a user first: use command: create user username identified by password unlock the user: use command: user unlock alter user username account unloc K (unable to log in without unlocking) Authorize the user: grant create session to user name.

3. In PLSQL, log in with sys (oracle system user), and be sure to select SYSDBA when logging in. Ordinary users log in and select normal; find the Users node in the menu on the left, right-click to select the add function.

4. The specific steps for assigning user permissions in oracle are as follows: First, open the computer and click the start icon in the lower left corner of the computer desktop. Then click the search box in the pop-up window, enter "cmd", and enter to confirm.

5. If it is through sql: Create user TEST identified by TEST, grant sysdba to TEST If it is through EM graphical interface, create a user, and then sys Just give it dba permission.

How to set up user passwordless login

First, open the running program at the beginning on the computer and click it. Then enter the command cmd to enter the cmd operation interface. Then type the command sqlplus/nolog to operate and log in to oracle.

First, enter so-oracle to the oracle user and log in to the oracle system with sqlplus/as sysdba. This login method uses the verification method of the operating system, so you don't need to enter the user name and password. Log in.

First, click the computer win button, click the installed oracle client folder in the pop-up menu, find [Enterprise Manager Console], and click enter. After opening the oracle client, find the service name you need to enter and click.

The first step is to log in to the operating system where the oracle database server is installed, and then open the command window, as shown in the figure below, and go to the following steps.

Username and password are the permission settings to enter the system. Sqlconn / as syddba; you can log in to the oracle super administrator user (no user and password required). Sqlconn zhangsan/password; you can log in to ordinary users by entering the user name and password.

When you install oracle, one step is to prompt you to create the passwords of these three users and think about the password you entered at that time. Case-sensitive. It really doesn't work. You can check whether your other users have dba permissions. If so, reset the password for these three users.

What are the usernames/passwords brought by the default installation of Oracle11g?

1. Oracle's default system user sys/system a, sys: This account is equivalent to the sa account in SQLServer, which is a super account with the largest permissions and can complete all the management tasks of the database.

2. When the console logs in to the oracle system with sqlplus / as sysdba, there are usually four usernames and passwords used.

3. What should be filled in the Oracle11g installation management password? You should fill in the password to log in to the database.

4. Where scott / tiger, hr / hr is the user name and password.Oracle Database, also known as Oracle RDBMS, or Oracle for short. It is a relational database management system of Oracle Company. It is a product that has always been in a leading position in the field of database.

5. Note: If your sys user password is not modified during installation, its default password is: [change_on_install].

oracle user lock problem

Generally, there are two reasons why Oracle users are locked: the administrator sets the expiration time of the password, and it is locked when the time comes; the administrator sets the number of password fault tolerance, such as 1 0 times, if the password is entered incorrectly more than 10 times, it will be locked.

The oracle database account has a password policy. In general, if the password is entered incorrectly more than 10 times, the account will be automatically locked and needs to be unlocked by the dba administrator. The number of locks dba administrators can also change it manually. Some important systems will be changed 3 times to strengthen system security.

Reason: Oracle entered the password incorrectly. After 10 attempts, it will automatically lock the user. Solution: Use the sqlplus command line to unlock.

How Oracle creates table space and users

Step 1: Log in to Oracle database Before creating a table space, we need to log in to the Oracle database.We can use SQL*Plus tools or PL/SQLDeveloper and other tools to log in to the Oracle database.

You can create a user according to the following steps: open oracle third-party tools, such as plsq, and then log in with a user with dba permission. Then open an SQL window.

In PLSQL, log in with sys (oracle system user), and you must select SYSDBA when logging in. Ordinary users log in and select normal; find the Users node in the menu on the left, right-click to select the add function.

/*Step 1: Create a temporary tablespace */ create temporary tablespace IVMS86X0_TEMP --- Test successful!Note: The name of the table space cannot be repeated. Even if the stored location is inconsistent, the dbf file can be consistent.

TEMPFILE D: appAdministratororadataNewDBDB_TEMP.DBFSIZE 32M AUTOEXTEND ON NEXT 32M MASIZE UNLI MITED EXTENT MANAGEMENT LOCAL; The data table space must be created before creating the user. If it is not created, the default permanent table space is system.

What is a user in oracle?

1. The oracle database account is for the database. Generally, the database administrator DBA creates and grants certain permissions (check, change, session and other permissions) to the user. It is the credentials of database operation.

2. Generally speaking, a user is a group of account passwords, and each user has different permissions. CREATE USER user_name IDENTIFIED BY password... ; A role is a collection of permissions. The role is assigned to a user, who has all the permissions in this role.

3. Oracle users use it to connect to the database and access the database object. ( Users are used to connect to the database to access the database).