Detailed tutorial on usage of inserting records

Inserting, browsing, modifying and deleting records in the data table can be completed using sql statements in the MySQL command line. The following describes how to execute basic SQL statements in the MySQL command line. 1. Insert records When establishing an empty database and data table, the first thing to consider is how to add total data to the data table. This operation can be completed using the insert statement. The syntax format is as follows: insert into data table name (column_name, column_name2,...) value (value1, value2,...) In MySQL, multiple rows of records can be inserted at the same time. The value list of each row of records is after the VALUES keyword. Separated by commas, standard SQL statements can only insert one row of records at a time. 2. Query database records To query data from the database, you must use the data query statement select. The select statement is the most commonly used query statement. Its use is somewhat complicated, but its function is powerful. The syntax format of the select statement is as follows: select selection_list  

1. MySQL insertion and query statement operation (MYSQL statement operation tutorial 1)

Introduction: Inserting, browsing, modifying and deleting records in the data table can be completed using sql statements in the MySQL command line. Here is how to do it in the MySQL command line Execute basic SQL statements. 1. Insert records When establishing an empty database and data table, the first thing you need to consider is how to add total data to the data table. This operation can be completed using the insert statement. The syntax format is as follows:

2. Details of how mysql optimizes the speed of inserting records

Introduction: When inserting records, the main factors that affect the insertion speed are indexing, uniqueness verification, and the number of records inserted at one time. According to these situations, optimization can be performed separately. This section will introduce several methods to optimize the speed of inserting records. Let’s take a look with the editor below

3. SQL Server: Detailed explanation of triggers

Introduction: A trigger is a special stored procedure that cannot be called explicitly, but is automatically called when a record is inserted into the table, updated, or deleted. activation. So triggers can be used to implement complex integrity constraints on tables.

4. SQL Server trigger creation, deletion, modification, view

Introduction: A trigger is a special stored procedure that cannot be called explicitly, but is automatically activated when a record is inserted, updated, or deleted into the table. So triggers can be used to implement complex integrity constraints on tables.

5. Data exception-I encountered a strange problem in the thinkphp project. The data will be changed after inserting the record

Introduction: As shown in the figure , when the first two print_r have exit statements behind them, the data printed by print_r is normal. However, if you put exit after the sentence of inserting records (the sentence in the red box), some of the printed things will become null. Obviously, the above $_GET, and data are modified when executing the insert statement. But the printing is before the insert statement. The picture below is the print_r print after the exit statement is placed after the insert statement; ...

6. pcskys_windows7loader A new PDO transaction instance of a PDO-based database operation class

Introduction: pcskys_windows7loader: pcskys_windows7loader A new PDO transaction instance based on PDO database operation class: copy the code code as follows:

7 in one method. identity_insert Detailed explanation of PHP insert syntax

Introduction: identity_insert: Detailed explanation of identity_insert PHP insert syntax: There was such a sentence in the last program: $exec="insert into info (ename,pcname) values ​​('".$_POST["ename"]."','".$_POST[" pcname"]."')"; Explain the meaning of this sentence. The syntax for inserting records in SQL is: insert into table name (field name 1, field name 2, ...) values ​​("value of field 1", "value of field 2"

8. PHP gets the Mysql insert record ID

Introduction: PHP gets the Mysql insert record ID

9. PHP insert syntax detailed explanation_PHP tutorial

Introduction: PHP insert syntax detailed explanation There is such a sentence in the last program: $exec="insertintoinfo(ename,pcname) values('".$_POST["ename"]."','".$_POST["pcname"]."')"; Explain the meaning of this sentence. SQL syntax for inserting records

10. php+odbc+access database operation function, passed the test under windows_PHP tutorial

##Introduction: php+odbc+ The access database operation function passed the test under Windows. I downloaded adodb a few days ago and wanted to use adodb to connect to the access database. Later, I was able to connect, but I couldn't update or insert records. I don't know why no one has given it to me yet. Answer that troubled question

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