CREATE TABLE IF NOT EXISTS 表名( 列名 类型, 列名 类型, 列名 类型, CONSTRAINT 约束名 约束类型(列名),#CONSTRAINT,约束名可以省略 CONSTRAINT 约束名 约束类型(列名), ... ); 1. 2. 3. 4. 5. 6. 7. 8. 举例说明 设计表,有字段emp_id 员工表的主键,dept_id 部门表的主键,员工表的外键,建表...
partspec=0x248efb0,ofTypename=0x0,constraints=0x0,options=0x0,oncommit=ONCOMMIT_NOOP,tablespacename=0x0,accessMethod=0x0,if_not_exists=false})|-- ProcessUtility|-- standard_ProcessUtility|-- ProcessUtilitySlow|caseT_Create
ALTER TABLE tb_emp9 DROP CONSTRAINT fk_emp_dept; 1. 2. 3. 4. 5. 6. 7. 8. 9. 【例3】删除数据表tb_dept2,SQL语句如下: DROP TABLE IF EXISTS tb_dept2; 1. 语句执行完毕之后,数据表列表中已经不存在名称为tb_dept2的表,删除操作成功。 在数据库中创建两个关联表,首先,创建表tb_dept2,SQ...
strSQL :='CREATE TABLE IF NOT EXISTS'||TG_RELNAME||'_'||curMM||'( CHECK('||time_column_name||'>='''|| startTime ||'''AND'||time_column_name||'<'''|| endTime ||''')) INHERITS ('||TG_RELNAME||') ;';EXECUTE strSQL;--创建索引 strSQL :='CREATE INDEX'||TG_RELNAME|...
PG::UndefinedTable: ERROR: relation "actioncodes" doesnotexist :ALTERTABLE"organizations"ADDCONSTRAINT"fk_rails_4ecaa2493e"FOREIGNKEY ("actioncode_id")REFERENCES"actioncodes" ("id") I have the following migration file for Organizations: classCreateOrganizations<ActiveRecord::Migrationdefchangecreate_ta...
CREATE SCHEMA IF NOT EXISTS postgres_exporter; GRANT USAGE ON SCHEMA postgres_exporter TO postgres_exporter; GRANT CONNECT ON DATABASE postgres TO postgres_exporter; CREATE OR REPLACE FUNCTION get_pg_stat_activity() RETURNS SETOF pg_stat_activity AS ...
ADD CONSTRAINT sensor_data_sensor_id_fkey FOREIGN KEY (sensor_id) REFERENCES public.sensors(id); pg_restore: warning: errors ignored on restore: 7 Despite these errors, I can see that my data is available in the database but I fear some indexes might be missing. Do you know if these ...
--exclude-table-data=PATTERN do NOT dump data for the specified table(s) --if-exists 当删除对象时使用IF EXISTS --inserts 以INSERT命令,而不是COPY命令的形式转储数据,使用该选项可以把数据加载到非pg数据库,会使恢复非常慢 该选项为每行生成1个单独的insert命令,?在恢复过程中遇到错误,将会丢失1行而...
create extension if not exists pg_stat_statements; 并且在配置文件postgresql.conf中添加: shared_preload_libraries = 'pg_stat_statements' pg_stat_statements.max = 10000 pg_stat_statements.track = all 否则执行下面的SQL会报错: -- To use IF statements, hence to be able to check if the user ex...
Note that this will prevent Ora2Pg to rewrite function replacement call if needed. Do not enable it unless looking forward at function breaks other export. Export type The export action is perform following a single configuration directive 'TYPE', some other add more control on what should be ...