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The MySQL WHERE Clause. The WHERE clause is used to filter records. It is used to extract only those records that fulfill a specified condition. WHERE Syntax. SELECT column1, column2, ... FROM table_name. WHERE condition; Note: The WHERE clause is not only used in . SELECT statements, it is also used in UPDATE, DELETE, etc.! Demo Database.
- MySQL AND, OR, NOT
The MySQL AND, OR and NOT Operators. The WHERE clause can be...
- MySQL AND, OR, NOT
27 gru 2012 · $query = mysql_query("SELECT image_id FROM list WHERE (style_id = 24 AND style_value = 'red') OR (style_id = 25 AND style_value = 'big') OR (style_id = 27 AND style_value = 'round'); Try out this query.
Besides the SELECT statement, you can use the WHERE clause in the UPDATE or DELETE statement to specify which rows to update or delete. When executing a SELECT statement with a WHERE clause, MySQL evaluates the WHERE clause after the FROM clause and before the SELECT and ORDER BY clauses:
23 mar 2023 · How to Query for Strings in SQL with the WHERE Clause and LIKE Operator. The WHERE clause lets you get only the records that meet a particular condition. The LIKE operator, on the other hand, lets you find a particular pattern in a column. You can combine these two to search for a string or a substring of a string.
21 cze 2024 · Syntax: SELECT column1, column2, ... FROM table_name. WHERE condition; Parameters: SELECT: Specifies the columns to be retrieved. column1, column2, ...: List of specific columns to retrieve. Use * to select all columns. table_name: Name of the table from which the data is selected. WHERE: Filters records based on specific conditions.
9 lut 2024 · SQL CONTAINS is used for full-text searches, allowing you to query databases for specific words, phrases, or patterns within text data. It's particularly useful for finding specific information in large text fields where the exact location of the data isn't known in advance.
As an extension to standard SQL, MySQL permits LIKE on numeric expressions. mysql> SELECT 10 LIKE '1%'; -> 1. MySQL attempts in such cases to perform implicit conversion of the expression to a string. See Section 14.3, “Type Conversion in Expression Evaluation”.
