在MySQL中,可以使用約束條件查詢來(lái)篩選出符合特定條件的數(shù)據(jù)集合。以下是一些常用的約束條件查詢語(yǔ)句:
SELECT * FROM table_name WHERE column_name = value;
SELECT * FROM table_name WHERE column_name > value;
SELECT * FROM table_name WHERE column_name1 = value1 AND column_name2 = value2;
SELECT * FROM table_name WHERE column_name IN (value1, value2, value3);
SELECT * FROM table_name WHERE column_name LIKE 'value%';
SELECT * FROM table_name WHERE column_name BETWEEN value1 AND value2;
SELECT * FROM table_name WHERE column_name IS NULL;
以上是一些常用的MySQL數(shù)據(jù)集合約束條件查詢語(yǔ)句,根據(jù)具體的需求和數(shù)據(jù)結(jié)構(gòu)可以靈活運(yùn)用。