[ WHERE condition ] [ GROUP BY [ ALL | DISTINCT ] grouping_element [, ...] ] [ HAVING condition] [ WINDOW window_name AS ( window_definition ) [, ...] ] [ { UNION | INTERSECT | EXCEPT } [ ALL | DISTINCT ] select ] [ ORDER BY {column_name | expr | position} [ASC | ...
SELECT语句中使用ALL或DISTINCT选项来显示表中符合条件的所有行或删除其中重复的数据行,默认为ALL。使用DISTINCT选项时,对于所有重复的数据行在SELECT返回的结果集合中只保留一行。 5、限制返回的行数 使用TOP n [PERCENT]选项限制返回的数据行数,TOP n说明返回n行,而TOP n PERCENT时,说明n是表示一百分数,指定返回的...
|- SELECT * FROM customers WHERE customers.is_delete=False - name: step_update_distinct type: SELECT_ALL_REPLACE from: step_filter_customer1 columns: - column: discount expr: 0.8 * discount - name: step_drop_distinct type: SELECT_ALL_EXCEPT from: step_update_distinct columns: - "distinct...
select * from master..sysdatabases D where sid not in(select sid from master..syslogins where name='sa')或者 select dbid, name AS DB_NAME from master..sysdatabases where sid <> 0x01 8.查询某一个表的字段和数据类型 select column_name,data_type from information_schema.columns w...
mysql> SELECT t1.name AS '姓名',t1.teacher_id '老师ID' FROM student AS t1 WHERE id % 2 = 1 LIMIT 3; 8>.当多个表中有相同的字段名,且需要查询出来时,需要在SELECT_EXPR中使用tbl_name.column_name 来显视指定要查询哪个表的字段 9>.查看另外的数据库的表数据 ...
sql:select exclude columns from TABLENAME Is there a way to exclude column(s) from a table without specifying all the columns? Google find a communication about sqlSERVER like: It would be nice to have an EXCEPT operator like the "\" (backslash) in set theory to exclude columns from the...
SELECTcolumn1,column2,...FROMtable_name; 其中,column1,column2,等是您要从表中选择的字段名称,而table_name是您要选择数据的表的名称。 如果要选择表中的所有列,您可以使用SELECT *语法。 以下是一些示例: 从Customers表中选择CustomerName和City列的数据: ...
SELECT columnA FROM table2; 在这个例子中,第一个查询返回两列(column1和column2),而第二个查询只返回一列(columnA)。由于这两个查询的列数不匹配,将会抛出“使用 UNION、INTERSECT 或 EXCEPT 运算符合并的所有查询必须在其目标列表中有相同数目的表达式”的错误。要解决这个问题,您需要确保每个查询的目标列表都...
[WITH<common_table_expression>[ , ...n ] ]SELECT<select_criteria>[ ; ]<select_criteria>::=[TOP(top_expression) ] [ALL|DISTINCT] { * |column_name| expression } [ , ...n ] [FROM{table_source} [ , ...n ] ] [WHERE<search_condition>] [GROUPBY<group_by_clause>] [HAVING<search...
Select all except Top 5 rows in SQL Select and check a boolean value with stored procedure? SELECT column aliases: Refer to alias in another column? SELECT COUNT from 2 intersected tables select count(*) Select DISTINCT in LEFT JOIN SELECT DISTINCT on one column, with multiple columns returne...