You asked: How many triggers can be used in MySQL table?

SIX triggers are allowed in MySQL table. They are as follows: BEFORE INSERT.

How many triggers are there in MySQL?

A MySQL trigger is a stored program (with queries) which is executed automatically to respond to a specific event such as insertion, updation or deletion occurring in a table. There are 6 different types of triggers in MySQL: 1.

How many triggers are possible per table in SQL?

There are 12 types of triggers can exist in a table in Oracle: 3 before statement, 3 after statement, 3 before each row and 3 after each row. On a single table you can define as many triggers as you need.

How many triggers can be created on a table?

how many triggers we can create on a table.. Maximum 12 Trigger can be applied on a single table.

What is the maximum number of triggers that can be applied to a table?

What is the maximum number of Triggers can be applied in a table ? Explanation: We can apply at max of 12 triggers in a table.

What triggers MySQL?

A trigger is a named database object that is associated with a table, and that activates when a particular event occurs for the table. Some uses for triggers are to perform checks of values to be inserted into a table or to perform calculations on values involved in an update.

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Why MyISAM gives the best performance?

MyISAM is designed with the idea that your database is queried far more than its updated and as a result it performs very fast read operations. If your read to write(insert|update) ratio is less than 15% its better to use MyISAM.

Is SQL a DML?

A DML is often a sublanguage of a broader database language such as SQL, with the DML comprising some of the operators in the language. … A popular data manipulation language is that of Structured Query Language (SQL), which is used to retrieve and manipulate data in a relational database.

What are the types of triggers?

Types of Triggers

  • Data Manipulation Language (DML) Triggers. DML triggers are executed when a DML operation like INSERT, UPDATE OR DELETE is fired on a Table or View. …
  • Data Definition Language (DDL) Triggers. …
  • LOGON Triggers. …
  • CLR Triggers.

How do you create a trigger?

create trigger [trigger_name]: Creates or replaces an existing trigger with the trigger_name. [before | after]: This specifies when the trigger will be executed. {insert | update | delete}: This specifies the DML operation.

How many indexes can be created on a table?

SQL Server allows us to create multiple Non-clustered indexes, up to 999 Non-clustered indexes, on each table, with index IDs values assigned to each index starting from 2 for each partition used by the index, as you can find in the sys. partitions table.

How many types of triggers exist in PL SQL?

Answer: There are two types of triggers in PL/SQL. They are Row-level trigger and Statement-level trigger.

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How many types of triggers are there in PL SQL?

A single SQL statement can potentially fire up to four types of triggers: BEFORE row triggers. BEFORE statement triggers. AFTER row triggers.

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