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When you use a stored procedure to process duplicate inserted values (if the inserted id value exists, the inserted id value increases by 1 before being inserted)Create Table TA (ID int primary key, name varchar (20 ))Insert TaSelect 1, 'A'Union all select 2, 'B'Union all select 3, 'C'Union all select 12, 'D'Union all select 13, 'E' Stored Procedure:Create proc

#商品id primary Table CREATE TABLE ' goods ' ( ' ID ' INT (one) UNSIGNED auto_increment not NULL, ' Data ' VARCHAR not NULL DEFAULT ', PRIMARY KEY (' id ') ) Type=innodb; #商品多图片从表 CREATE TABLE ' Good_pic ' ( ' ID ' INT (one) UNSIGNED auto_increment not NULL, ' Goodid ' INT (one) UNSIGNED not NULL DEFAULT ' 0 ', ' Pic

table, even if the other columns allow the appropriate duplicates to occur. This type of primary key column is commonly referred to as a pseudo-primary key or surrogate key . Most databases provide an underlying scenario that is unrelated to the current transaction to ensure that a globally unique integer is generated every time as a pseudo-primary key, even if the client is initiating concurrent operations at this time. The role of the primary key exists: 1. Ensure that the data in one table d

How does php traverse cross-dimensional arrays and give their id and pid (parent key id) PHPcodearray (7) {[1] = gt; array (5) {[ quot; id quot;] = gt; string (1) quot; 1 quo php) PHP code Array (7) {[1] => array (5) {["id"] => string (1) "1" ["pid"] => string (1) "0" ["name"] => string (15) "AssetManageme

Today, I made a long mistake at the company. It may be due to my carelessness. Segment firstCode: String id = Params. Get ("ID") + ""; If (null = ID | "". Equals (Id. Trim ())){ // When ID is null .................. } Else { ................... } Let's see w

When you do a Web site, you often encounter the article ID is not continuous because of the deletion of the article, because the article ID field in the database properties are generally automatic growth, this is a register in MySQL records, when the deletion of records added, the value of the increment will not occupy your deleted values, but continue on the original base + +. Discontinuous records in a da

This paper analyzes the difference between @id and @+id in Android programming. Share to everyone for your reference, specific as follows: Components in Android need to be represented by a value of type int, which is the value of the id attribute in the component label. The id attribute can only accept values for res

1, on the IPhone home screen to find the "app Store" icon, click to open 2. After opening the App Store, slide up with your fingers and click the "Sign in" button at the bottom. 3, in the Pop-up Options menu, click the "Create New Apple ID" option 4, in the selection of countries and regions page, the default is China, click "Next" to continue 5, in terms and privacy page, directly click "Next" to continue 6, in the pop-u

The following is a detailed analysis of the implementation code for converting the digit ID to the letter ID using PHP. If you need a friend, refer The following is a detailed analysis of the implementation code for converting the digit ID to the letter ID using PHP. If you need a friend, refer

What if your Apple ID has been deactivated? Some users who are logged in with the Apple ID have found a problem, prompting the Apple ID to deactivate, so how do we solve the problem? Small knitting below will give you a detailed introduction to the solution. What if the Apple ID is deactivated? If your account appear

Find the current maximum id and Database id of all tables in the database. Today, we need to count the current maximum IDs of all tables in the database. It is too difficult to query each table one by one, so we can write a stored procedure for future use. Create procedure [dbo]. [get_tableid] Create table # tablespaceinfo -- CREATE a result storage TABLE (Nameinfo varchar (50 ), Max_idinfo int) DECLARE

In mysql, what is the meaning of: id and: id gt; $ orderid? $ Agentid = pdo_fetchcolumn ('select agentid from '. tablename ('shop _ order ').' Where id =: idLimit 1', array ( ': ID' => $ orderid )); In mysql, what does id =: id