Article for:SQL Server▾ Query below lists table (and view) indexes. Query selectschema_name(t.schema_id) +'.'+ t.[name]astable_view,casewhent.[type] ='U'then'Table'whent.[type] ='V'then'View'endas[object_type
Article for:SQL Server▾ Query below lists all table columns in a database. Query selectschema_name(tab.schema_id)asschema_name, tab.nameastable_name, col.column_id, col.nameascolumn_name, t.nameasdata_type, col.max_length, col.precisionfromsys.tablesastabinnerjoinsys.columnsascolontab....
SELECT'Table'ASobject_type,owner,table_nameFROMall_tablesUNIONALLSELECT'View',owner,view_nameFROMall_views; USER_TABLES and USER_VIEWS SELECT'Table'ASobject_type,table_nameFROMuser_tablesUNIONALLSELECT'View',view_nameFROMuser_views; Show Tables in SQL Server There are a few ways to list table...
In the above function we are taking two parameters from the user. The first parameter defines the list and the second parameter defines delimiter. Return type of function is table. We return a table that contains two column. The first column of table contains a unique id for each item and...
CREATETABLEtbl_hash(i int)PARTITIONBYHASH(i)CONFIGURATION(modulus3); 思路相同,需要指定configuration,并在进行hash分区时需要提供modulus。 代码语言:javascript 代码运行次数:0 运行 AI代码解释 postgres=# create tabletpart_hash(a int primary key,b text)partition byhash(a)configuration(modulus5);CREATETABLE...
Show all tables in the Oracle Database# To showall tablesin the entire Oracle Database, you query from thedba_tablesview as follows: SELECTtable_nameFROMdba_tables;Code language:SQL (Structured Query Language)(sql) You will get the following error message if you don’t have access to the...
SELECTcolumn_name(s)FROMtable_nameWHEREcolumn_nameIN(value1,value2,value3,...); 1. 2. 3. 在上述语法中,column_name表示需要匹配的字段,table_name表示需要进行查询的表名,value1, value2, value3, ...表示要传入的列表。 代码示例 假设我们有一个名为products的表,其中包含了商品的信息。我们希望从...
CREATE DATABASE example_db; CREATE user 'example_user'@'192.0.2.0' IDENTIFIED BY 'password'; GRANT SELECT,INSERT,UPDATE,DELETE ON example_db.* TO 'example_user' IDENTIFIED BY 'password'; USE example_db; CREATE TABLE message_app_users (user_id INT NOT NULL AUTO_INCREMENT PRIMARY KEY, user...
set @@global.sql_mode =’STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION’; 如下图: 解决方法二: 成功的步骤: iterm打开 sudo vim /etc/mysql/conf.d/mysql.cnf
L_EXTENDEDPRICE) -> Nested loop inner join -> Table scan on dt -> Materialize with deduplication -> scan on in-list: 100000 rows -> Index lookup on lineitem using LINEITEM_FK2 (L_PARTKEY=dt._col_1), with index condition: (lineitem.L_PARTKEY = dt._col_1) (cost=7.34 rows=...