Αποτελέσματα Αναζήτησης
31 Μαΐ 2023 · Instead of SELECT * FROM MyTable WHERE Column1 CONTAINS 'word1 word2 word3', add And in between those words like: SELECT * FROM MyTable WHERE Column1 CONTAINS 'word1 And word2 And word3'. For details, see CONTAINS (Transact-SQL). For selecting phrases, use double quotes like:
The EXISTS operator is used to test for the existence of any record in a subquery. The EXISTS operator returns TRUE if the subquery returns one or more records. EXISTS Syntax. SELECT column_name (s) FROM table_name. WHERE EXISTS. (SELECT column_name FROM table_name WHERE condition); Demo Database.
12 Σεπ 2022 · The most common Boolean function found in a T-SQL IF statement is the EXISTS function. When combined with a query, this function returns true when the query returns at least one row. It returns false when the query returns no rows. Since the function evaluates as true or false, there is no need to use an = or any other operator.
28 Μαΐ 2024 · We can use either a CASE statement or an IIF() function to implement IF-THEN logic in SQL. In this tutorial, we’ll explore how to implement IF-THEN logic in SQL across various dialects such as SQL Server, MySQL, and PostgreSQL.
29 Αυγ 2024 · The single parameter accepted by EXISTS is a SELECT statement. The function will return TRUE if the SELECT statement parameter returns at least 1 row and FALSE if exactly 0 rows are returned. EXISTS is most commonly used as an argument in IF statements, WHILE loops, and WHERE clauses.
21 Μαρ 2022 · The IF EXISTS decision structure will execute a block of SQL code only if an inner query returns one or more rows. If the inner query returns an empty result set, the block of code within the structure is skipped. The inner query used with the IF EXISTS structure can be anything you need it to be.
30 Οκτ 2023 · Different methods to use SQL IF Statement in SELECT. CASE Statement: The CASE statement directly introduces conditional logic (if-else) into SELECT statements, allowing different values to be returned based on evaluated conditions.
