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#SQLITE UPDATE ALL ROWS IN ONE TABLE HOW TO#

A logical operator returns 1, 0, or a NULL value.

Logical operators allow you to test the truth of some expressions. The following table illustrates the comparison operators that you can use to construct expressions: Operator SQLite comparison operatorsĪ comparison operator tests if two expressions are the same. WHERE column_4 BETWEEN 10 AND 20 Code language: SQL (Structured Query Language) ( sql )īesides the SELECT statement, you can use the WHERE clause in the UPDATE and DELETE statements. The search condition in the WHERE has the following form: left_expression COMPARISON_OPERATOR right_expression Code language: SQL (Structured Query Language) ( sql )įor example, you can form a search condition as follows: WHERE column_1 = 100

Third, make the final result set based on the rows in the previous step with columns in the SELECT clause.

Second, evaluate the conditions in the WHERE clause to get the rows that met these conditions.

First, check the table in the FROM clause.

When evaluating a SELECT statement with a WHERE clause, SQLite uses the following steps:

In this example, you add a WHERE clause to the SELECT statement to filter rows returned by the query. Search_condition Code language: SQL (Structured Query Language) ( sql ) It appears after the FROM clause as the following statement: SELECT The WHERE clause is an optional clause of the SELECT statement.

#SQLITE UPDATE ALL ROWS IN ONE TABLE HOW TO#

Summary: in this tutorial, you will learn how to use SQLite WHERE clause to specify the search condition for rows returned by the query.