标签:INSERT name ... UPDATA PRIORITY expr col DELETE
INSERT
INSERT [LOW_PRIORITY | DELAYED | HIGH_PRIORITY] [IGNORE] [INTO] tbl_name [(col_name,...)] {VALUES | VALUE} ({expr | DEFAULT},...),(...),... [ ON DUPLICATE KEY UPDATE col_name=expr [, col_name=expr] ... ] Or: INSERT [LOW_PRIORITY | DELAYED | HIGH_PRIORITY] [IGNORE] [INTO] tbl_name SET col_name={expr | DEFAULT}, ... [ ON DUPLICATE KEY UPDATE col_name=expr [, col_name=expr] ... ] Or: INSERT [LOW_PRIORITY | HIGH_PRIORITY] [IGNORE] [INTO] tbl_name [(col_name,...)] SELECT ... [ ON DUPLICATE KEY UPDATE col_name=expr [, col_name=expr] ... ]
示例:
INSERT INTO students (Name,Age,Gender) VALUES ('CKH',100,'M'); INSERT INTO students SET Name='ckh',Age=100,Gender='M'; INSERT INTO stu SELECT * FROM students WHERE Age > 30;
DELETE
DELETE [LOW_PRIORITY] [QUICK] [IGNORE] FROM tbl_name [WHERE where_condition] [ORDER BY ...] [LIMIT row_count]
注意:一定要有限制条件,否则将清空表中的所有数据;
限制条件:WHERE、LIMIT
示例:
DELETE FROM students WHERE StuID = 18;
UPDATE
UPDATE [LOW_PRIORITY] [IGNORE] table_reference SET col_name1={expr1|DEFAULT} [, col_name2={expr2|DEFAULT}] ... [WHERE where_condition] [ORDER BY ...] [LIMIT row_count]
注意:一定要有限制条件,否则将修改所有行的指定字段;
限制条件:WHERE、LIMIT
示例:
UPDATA students SET Name='CKH',Age=100,Gender='M' WHERE StuID=10;
标签:INSERT,name,...,UPDATA,PRIORITY,expr,col,DELETE
来源: https://www.cnblogs.com/ckh2014/p/14465999.html
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