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2025年計(jì)算機(jī)二級(jí)MySQL編程挑戰(zhàn)試題及答案姓名:____________________
一、單項(xiàng)選擇題(每題2分,共10題)
1.MySQL數(shù)據(jù)庫(kù)中,用于創(chuàng)建表的語(yǔ)句是:
A.CREATEDATABASE
B.INSERTINTO
C.UPDATE
D.ALTERTABLE
2.在MySQL中,以下哪個(gè)命令用于刪除表?
A.DROPTABLE
B.DELETE
C.TRUNCATETABLE
D.SELECT
3.以下哪個(gè)函數(shù)用于獲取當(dāng)前日期和時(shí)間?
A.NOW()
B.GETDATE()
C.CURRENT_DATE()
D.CURRENT_TIME()
4.在MySQL中,以下哪個(gè)命令用于創(chuàng)建數(shù)據(jù)庫(kù)?
A.CREATETABLE
B.CREATEDATABASE
C.INSERTINTO
D.ALTERTABLE
5.以下哪個(gè)SQL語(yǔ)句用于查詢表中所有記錄?
A.SELECT*FROMtable_name
B.SELECTALLFROMtable_name
C.SELECT*WHEREtable_name
D.SELECTALLWHEREtable_name
6.在MySQL中,以下哪個(gè)命令用于修改表結(jié)構(gòu)?
A.CREATETABLE
B.ALTERTABLE
C.UPDATE
D.DELETE
7.以下哪個(gè)函數(shù)用于獲取字符串的長(zhǎng)度?
A.LENGTH()
B.CHAR_LENGTH()
C.STR_LENGTH()
D.LEN()
8.在MySQL中,以下哪個(gè)命令用于刪除數(shù)據(jù)庫(kù)?
A.DROPDATABASE
B.DELETEDATABASE
C.TRUNCATEDATABASE
D.SELECT
9.以下哪個(gè)SQL語(yǔ)句用于查詢特定列的記錄?
A.SELECTcolumn_nameFROMtable_name
B.SELECTcolumnFROMtable
C.SELECT*WHEREcolumn_name
D.SELECT*FROMWHEREcolumn
10.在MySQL中,以下哪個(gè)命令用于插入數(shù)據(jù)?
A.INSERTINTO
B.INSERTINTOTABLE
C.INSERTINTOCOLUMN
D.INSERTINTOVALUES
二、填空題(每空2分,共10空)
1.在MySQL中,創(chuàng)建表的語(yǔ)法是:__________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________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二、多項(xiàng)選擇題(每題3分,共10題)
1.MySQL中的數(shù)據(jù)類型包括:
A.整型
B.浮點(diǎn)型
C.字符串型
D.日期型
E.文本型
2.以下哪些是MySQL中的常用函數(shù)?
A.NOW()
B.SUM()
C.AVG()
D.MAX()
E.MIN()
3.在MySQL中,以下哪些是用于創(chuàng)建索引的語(yǔ)句?
A.CREATEINDEX
B.INDEX
C.UNIQUE
D.PRIMARYKEY
E.FOREIGNKEY
4.以下哪些是MySQL中的聚合函數(shù)?
A.COUNT()
B.GROUPBY
C.ORDERBY
D.MAX()
E.MIN()
5.在MySQL中,以下哪些是用于修改表結(jié)構(gòu)的語(yǔ)句?
A.ALTERTABLE
B.DROPCOLUMN
C.ADDCOLUMN
D.MODIFYCOLUMN
E.RENAMECOLUMN
6.以下哪些是MySQL中的連接操作?
A.INNERJOIN
B.LEFTJOIN
C.RIGHTJOIN
D.FULLJOIN
E.CROSSJOIN
7.在MySQL中,以下哪些是用于刪除數(shù)據(jù)的語(yǔ)句?
A.DELETE
B.TRUNCATETABLE
C.DROPTABLE
D.SELECT
E.UPDATE
8.以下哪些是MySQL中的日期和時(shí)間函數(shù)?
A.CURDATE()
B.CURRENT_TIME()
C.TIMESTAMP()
D.STR_TO_DATE()
E.DATE_FORMAT()
9.在MySQL中,以下哪些是用于排序的語(yǔ)句?
A.ORDERBY
B.ASC
C.DESC
D.GROUPBY
E.HAVING
10.以下哪些是MySQL中的權(quán)限管理命令?
A.GRANT
B.REVOKE
C.CREATEUSER
D.DROPUSER
E.SELECT
三、判斷題(每題2分,共10題)
1.在MySQL中,每張表只能有一個(gè)主鍵。()
2.使用ALTERTABLE語(yǔ)句可以修改表的結(jié)構(gòu),包括添加、刪除和修改列。()
3.MySQL中的LIKE操作符只能用于字符串類型的字段。()
4.在MySQL中,可以使用LIMIT語(yǔ)句限制查詢結(jié)果的數(shù)量。()
5.每個(gè)MySQL數(shù)據(jù)庫(kù)都有一個(gè)默認(rèn)的字符集和校對(duì)規(guī)則。()
6.使用DELETE語(yǔ)句可以刪除表中的所有數(shù)據(jù),但是不會(huì)刪除表本身。()
7.在MySQL中,可以使用DISTINCT關(guān)鍵字來(lái)避免查詢結(jié)果中出現(xiàn)重復(fù)的行。()
8.MySQL中的外鍵約束可以保證數(shù)據(jù)的引用完整性。()
9.使用SHOWTABLES命令可以查看數(shù)據(jù)庫(kù)中所有表的列表。()
10.在MySQL中,可以使用INSERT
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