Oracle,mysql,sqlserver,postgresql語句幾點比較
阿新 • • 發佈：2017-05-30
記錄 rom person lln number data select ont padding
1.分頁
Oracle： SELECT * FROM(SELECT A.*, ROWNUM RN FROM (select T.* from sj_receiptinfo t WHERE t.TAXNO LIKE CONCAT(‘%‘, CONCAT(?, ‘%‘)) order by t.id desc) A WHERE ROWNUM <= ?
)WHERE RN > ?
mysql：
select * from tableName where 條件
sqlServer： SELECT w2.n, w1.* FROM ARTICLE w1,( SELECT TOP 1030 row_number() OVER (ORDER BY YEAR DESC, ID DESC) n, ID FROM ARTICLE) w2 WHERE w1.ID = w2.ID AND w2.n > 1000 ORDER BY w2.n ASC
postgresql：select * from xxx limit pagesize offset offsetNum ;
pagesize是固定的，即每頁顯示多少記錄。
offsetNum＝（當前頁數－1）*pagesize
2.查詢頭5條記錄
Oracle： SELECT * FROM PersonsWHERE ROWNUM <= 5
mysql: SELECT * FROM Persons LIMIT 5
sqlServer: SELECTTOP 2* FROM Personspostgresql：SELECT * FROM Persons LIMIT 5。跟mysql一樣3.模糊查詢Oracle：select T.* from sj_receiptinfo t WHERE t.TAXNO LIKE CONCAT(‘%‘, CONCAT(?, ‘%‘))
mysql：select T.* from sj_receiptinfo t WHERE t.TAXNO LIKE CONCAT(‘%‘, ？, ‘%‘)
sqlServer：select T.* from sj_receiptinfo t WHERE t.TAXNO LIKE ‘%%’postgresql：select *。( T .類別代碼 || ‘-‘ || T .發票號碼 ) AS 號碼 from account where username ~* ‘baidu‘;找出數據表account中全部用戶名包括baidu且不區分大寫和小寫的用戶的信息4.推斷nullOracle：SELECT ProductName,UnitPrice*(UnitsInStock+NVL(UnitsOnOrder,0))FROM Productsmysql：SELECT ProductName,UnitPrice*(UnitsInStock+IFNULL(UnitsOnOrder,0))FROM ProductssqlServer：SELECT ProductName,UnitPrice*(UnitsInStock+ISNULL(UnitsOnOrder,0))FROM Productspostgresql：SELECT ProductName,UnitPrice*(UnitsInStock+COALESCE(UnitsOnOrder,0))FROM Products5.插入數據Oracle：insert into company(id,name,parentid,ccdm) values(COMPANY_SEQ.NEXTVAL,?,?,?
)序列
mysql：insert into person(fullName,companyName) values(?,?) 由於ID是自己主動增長auto_increment6.查詢最大idOracle：SELECT NVL(MAX(ID),0)+1 FROM REPOT_BS
Oracle,mysql,sqlserver,postgresql語句幾點比較