What is the usage of oracle insert?
In Oracle, the insert statement is used to insert one or more rows of data into the data table. The syntax is "insert into table name (column name 1, column name 2, column name 3...) values" (Value 1, Value 2, Value 3...);"; The number of column names and the number of values must be consistent, and the value type and column type must correspond one to one.
The operating environment of this tutorial: Windows 7 system, Oracle 11g version, Dell G3 computer.
In Oracle, the insert statement is used to insert one or more rows of data into a data table.
insert command structure:
insert into 表名（列名1,列名2,列名3.....）values(值1,值2,值3.....);
Syntax analysis:
1. The column name can be omitted. When the column name is not filled in, the default is table All columns in are arranged in the order in which the table was created.
2. The number of column names and the number of values must be consistent, and the type of values must correspond to the type of columns.
3. When certain constraints are set on certain fields in the table, the value must be inserted according to the constraints of the fields. For example: the student information table (STUINFO) is set with a primary key (primary key field is STUID), so this field must be unique and cannot be repeated with the original data. Fields such as age, stuname, and calassno are required fields, so they must have values.
Case 1: Insert a piece of data into the student information table (stuinfo):
insert into STUDENT.STUINFO (STUID, STUNAME, SEX, AGE, CLASSNO, STUADDRESS, GRADE, ENROLDATE, IDNUMBER) values ('SC201801005', '龙七', '1', 26, 'C201801', '福建省厦门市XXX号', '2018', to_date('01-09-2018', 'dd-mm-yyyy'), '3503021992XXXXXXXX'); select * from student.stuinfo t where t.stuid='SC201801005';
The results are as follows:
Case 2: Insert duplicate data into the student information table (stuinfo):
insert into STUDENT.STUINFO (STUID, STUNAME, SEX, AGE, CLASSNO, STUADDRESS, GRADE, ENROLDATE, IDNUMBER) values ('SC201801005', '龙七', '1', 26, 'C201801', '福建省厦门市XXX号', '2018', to_date('01-09-2018', 'dd-mm-yyyy'), '3503021992XXXXXXXX');
The results are as follows:
Recommended tutorial: " Oracle Tutorial》
The above is the detailed content of What is the usage of oracle insert?. For more information, please follow other related articles on the PHP Chinese website!
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
AI Hentai Generator
Generate AI Hentai for free.
Hot Article
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
How long will Oracle database logs be kept?
May 10, 2024 am 03:27 AM
The retention period of Oracle database logs depends on the log type and configuration, including: Redo logs: determined by the maximum size configured with the "LOG_ARCHIVE_DEST" parameter. Archived redo logs: Determined by the maximum size configured by the "DB_RECOVERY_FILE_DEST_SIZE" parameter. Online redo logs: not archived, lost when the database is restarted, and the retention period is consistent with the instance running time. Audit log: Configured by the "AUDIT_TRAIL" parameter, retained for 30 days by default.
Function to calculate the number of days between two dates in oracle
May 08, 2024 pm 07:45 PM
The function in Oracle to calculate the number of days between two dates is DATEDIFF(). The specific usage is as follows: Specify the time interval unit: interval (such as day, month, year) Specify two date values: date1 and date2DATEDIFF(interval, date1, date2) Return the difference in days
The order of the oracle database startup steps is
May 10, 2024 am 01:48 AM
The Oracle database startup sequence is: 1. Check the preconditions; 2. Start the listener; 3. Start the database instance; 4. Wait for the database to open; 5. Connect to the database; 6. Verify the database status; 7. Enable the service (if necessary ); 8. Test the connection.
How much memory does oracle require?
May 10, 2024 am 04:12 AM
The amount of memory required by Oracle depends on database size, activity level, and required performance level: for storing data buffers, index buffers, executing SQL statements, and managing the data dictionary cache. The exact amount is affected by database size, activity level, and required performance level. Best practices include setting the appropriate SGA size, sizing SGA components, using AMM, and monitoring memory usage.
How to use interval in oracle
May 08, 2024 pm 07:54 PM
The INTERVAL data type in Oracle is used to represent time intervals. The syntax is INTERVAL <precision> <unit>. You can use addition, subtraction, multiplication and division operations to operate INTERVAL, which is suitable for scenarios such as storing time data and calculating date differences.
How to see the number of occurrences of a certain character in Oracle
May 09, 2024 pm 09:33 PM
To find the number of occurrences of a character in Oracle, perform the following steps: Get the total length of a string; Get the length of the substring in which a character occurs; Count the number of occurrences of a character by subtracting the substring length from the total length.
How to replace string in oracle
May 08, 2024 pm 07:24 PM
The method of replacing strings in Oracle is to use the REPLACE function. The syntax of this function is: REPLACE(string, search_string, replace_string). Usage steps: 1. Identify the substring to be replaced; 2. Determine the new string to replace the substring; 3. Use the REPLACE function to replace. Advanced usage includes: multiple replacements, case sensitivity, special character replacement, etc.
Oracle database server hardware configuration requirements
May 10, 2024 am 04:00 AM
Oracle database server hardware configuration requirements: Processor: multi-core, with a main frequency of at least 2.5 GHz. For large databases, 32 cores or more are recommended. Memory: At least 8GB for small databases, 16-64GB for medium sizes, up to 512GB or more for large databases or heavy workloads. Storage: SSD or NVMe disks, RAID arrays for redundancy and performance. Network: High-speed network (10GbE or higher), dedicated network card, low-latency network. Others: Stable power supply, redundant components, compatible operating system and software, heat dissipation and cooling system.
